GET https://kbin.spritesserver.nl/index.php/m/linux@lemmy.ml/t/24511/My-First-Regular-Expressions/top

Response
200 OK
IP
113.180.220.76
Profiled on
Token
dc30d2

Security

Token

There is no security token.

Firewall

main Name
Security enabled
Stateless

Configuration

Key Value
provider security.user.provider.concrete.app_user_provider
context main
entry_point App\Security\KbinAuthenticator
user_checker App\Security\UserChecker
access_denied_handler (none)
access_denied_url (none)
authenticators 
[
  "two_factor"
  "remember_me"
  "App\Security\KbinAuthenticator"
  "App\Security\FacebookAuthenticator"
  "App\Security\GoogleAuthenticator"
  "App\Security\GithubAuthenticator"
  "App\Security\KeycloakAuthenticator"
]

Listeners

Listener Duration Response 
Symfony\Component\Security\Http\Firewall\ChannelListener {#723
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
  -logger: Monolog\Logger {#783 …}
  -httpPort: 80
  -httpsPort: 443
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\ContextListener {#706
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …}
  -sessionKey: "_security_main"
  -logger: Monolog\Logger {#783 …}
  -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …}
  -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
  -registered: false
  -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …}
  -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}
}
 0.24 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.04 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy
# Voter class
1 
"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4 
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5 
"App\Security\Voter\EntryCommentVoter"
6 
"App\Security\Voter\EntryVoter"
7 
"App\Security\Voter\MagazineVoter"
8 
"App\Security\Voter\MessageThreadVoter"
9 
"App\Security\Voter\MessageVoter"
10 
"App\Security\Voter\NotificationVoter"
11 
"App\Security\Voter\OAuth2UserConsentVoter"
12 
"App\Security\Voter\PostCommentVoter"
13 
"App\Security\Voter\PostVoter"
14 
"App\Security\Voter\UserVoter"

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
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      \n
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      \n
      Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
      \n
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      \n
      - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
      - No misinformation\n
      - No NSFW content\n
      - No hate speech, bigotry, etc\n
      \n
      ### Related Communities\n
      \n
      - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
      - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
      - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
      - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
      \n
      Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
      """
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      date: 2024-10-22 09:53:16.0 +02:00
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      date: 2023-11-02 13:51:08.0 +01:00
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  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
  +slug: "My-First-Regular-Expressions"
  +title: "My First Regular Expressions"
  +url: null
  +body: """
    I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
    \n
    What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
    \n
    I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
    \n
    I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
    \n
    I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
    \n
    The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
    \n
    `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
    \n
    Which gives me a list of movies of which this is an example:\n
    \n
    `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
    \n
    Then I used sed with the expression groups to remove:\n
    \n
    - the leading forward slash\n
    - Everything from `.[` to the end\n
    - All of the periods in between words\n
    \n
    And the last expression checks for one or more spaces and replaces them with a single space.\n
    \n
    This is the full sed command:\n
    \n
    `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
    \n
    Which leaves me with a pretty list of movies that looks like this:\n
    \n
    `The Hunger Games (2012)`\n
    \n
    I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
    \n
    Edit: fixed title so it didn’t say “regex expressions”
    """
  +type: "article"
  +lang: "en"
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  +hasEmbed: false
  +commentCount: 63
  +favouriteCount: 214
  +score: 0
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  +sticky: false
  +lastActive: DateTime @1711562613 {#2410
    date: 2024-03-27 19:03:33.0 +01:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1884 …}
  +votes: Doctrine\ORM\PersistentCollection {#1973 …}
  +reports: Doctrine\ORM\PersistentCollection {#1959 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1927 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2442 …}
  +badges: Doctrine\ORM\PersistentCollection {#2440 …}
  +children: []
  -id: 24511
  -titleTs: "'express':4 'first':2 'regular':3"
  -bodyTs: "'-70160':243 '-9':302 '/g':312,314 '/the.hunger.games':240 '0':301 '10':123 '2012':241,332 '9':311 'a-z':298 'a-za-z0':307 'alreadi':131 'also':144 'archiv':187 'asid':18 'begin':363 'book':129 'care':22 'charact':76 'check':275 'clean':166 'cobbl':88 'collect':183 'command':293 'could':337 'd':26 'didn':377 'done':339 'dvd':182 'e.f':10 'edit':372 'egrep':160,201,221 'eie':295 'eleg':341 'end':263 'ever':139 'everyth':259 'exact':67 'exampl':239 'excit':359 'express':7,39,64,79,104,155,191,251,274,381 'feedback':348 'file':205,217 'file.tar.gz':220 'filenam':171 'first':35,190 'fix':373 'forward':257 'friedl':11 'full':291 'game':331 'generat':164 'get':210 'give':228 'group':252 'happi':57,345 'hunger':330 'jeffrey':9 'kv':224,305 'last':273 'lead':256 'learn':151 'leav':317 'life':17 'like':327 'list':169,203,231,322 'look':326 'lot':149 'm':30,49,55,120,223,303,334,344,357,362 'manipul':45 'master':5 'meant':105 'movi':176,233,324 'movielist':226,315 'mp4':244 'much':135 'name':213 'need':112 'never':95 'nobodi':14 'o':222 'one':196,277 'overflow':92 'p4':225,304 'past':86 'period':267 'pretti':31,321 'proud':32 'pull':172 'purpos':73 'read':4 'realli':96 'recogn':145 'regex':83,142,366,380 'regular':6,38 'remov':254 'replac':282 'rip':179 'say':379 'sed':162,248,292,294 'set':36 'share':27 'sinc':13 'singl':286 'slash':258 'someth':28 'space':280,287 'stack':91 'stuff':87 'sure':335 'tar':199,218 'tarbal':175,185,208 'text':47 'thought':24 'time':118 'titl':374 'tmdbid':242 'togeth':89 'tzvf':219 'understand':66,133,365 'understood':97 'use':82,158,197,247,370 've':2,81,178 'video':216 'way':126 'wife':21 'word':270 'work':50,100 'wrote':42,62,153,193 'z':300 'z0':310 'za':309"
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  +ranking: 1703542531
  +visibility: "visible             "
  +apId: "https://lemmy.world/post/9942188"
  +editedAt: DateTimeImmutable @1707607314 {#1850
    date: 2024-02-11 00:21:54.0 +01:00
  }
  +createdAt: DateTimeImmutable @1703456131 {#2420
    date: 2023-12-24 23:15:31.0 +01:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\Entry {#2412
  +user: Proxies\__CG__\App\Entity\User {#1970 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "linux@lemmy.ml"
    +title: "linux"
    +description: """
      From Wikipedia, the free encyclopedia\n
      \n
      Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
      \n
      Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
      \n
      ### Rules\n
      \n
      - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
      - No misinformation\n
      - No NSFW content\n
      - No hate speech, bigotry, etc\n
      \n
      ### Related Communities\n
      \n
      - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
      - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
      - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
      - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
      \n
      Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1406
    +entryCommentCount: 28632
    +postCount: 6
    +postCommentCount: 214
    +isAdult: false
    +customCss: null
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      date: 2024-10-22 09:52:22.0 +02:00
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    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
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    +apDiscoverable: true
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    +apFetchedAt: DateTime @1729583596 {#270
      date: 2024-10-22 09:53:16.0 +02:00
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    +apDeletedAt: null
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    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1698929468 {#272
      date: 2023-11-02 13:51:08.0 +01:00
    }
  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
  +slug: "My-First-Regular-Expressions"
  +title: "My First Regular Expressions"
  +url: null
  +body: """
    I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
    \n
    What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
    \n
    I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
    \n
    I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
    \n
    I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
    \n
    The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
    \n
    `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
    \n
    Which gives me a list of movies of which this is an example:\n
    \n
    `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
    \n
    Then I used sed with the expression groups to remove:\n
    \n
    - the leading forward slash\n
    - Everything from `.[` to the end\n
    - All of the periods in between words\n
    \n
    And the last expression checks for one or more spaces and replaces them with a single space.\n
    \n
    This is the full sed command:\n
    \n
    `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
    \n
    Which leaves me with a pretty list of movies that looks like this:\n
    \n
    `The Hunger Games (2012)`\n
    \n
    I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
    \n
    Edit: fixed title so it didn’t say “regex expressions”
    """
  +type: "article"
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  +lastActive: DateTime @1711562613 {#2410
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  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1884 …}
  +votes: Doctrine\ORM\PersistentCollection {#1973 …}
  +reports: Doctrine\ORM\PersistentCollection {#1959 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1927 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2442 …}
  +badges: Doctrine\ORM\PersistentCollection {#2440 …}
  +children: []
  -id: 24511
  -titleTs: "'express':4 'first':2 'regular':3"
  -bodyTs: "'-70160':243 '-9':302 '/g':312,314 '/the.hunger.games':240 '0':301 '10':123 '2012':241,332 '9':311 'a-z':298 'a-za-z0':307 'alreadi':131 'also':144 'archiv':187 'asid':18 'begin':363 'book':129 'care':22 'charact':76 'check':275 'clean':166 'cobbl':88 'collect':183 'command':293 'could':337 'd':26 'didn':377 'done':339 'dvd':182 'e.f':10 'edit':372 'egrep':160,201,221 'eie':295 'eleg':341 'end':263 'ever':139 'everyth':259 'exact':67 'exampl':239 'excit':359 'express':7,39,64,79,104,155,191,251,274,381 'feedback':348 'file':205,217 'file.tar.gz':220 'filenam':171 'first':35,190 'fix':373 'forward':257 'friedl':11 'full':291 'game':331 'generat':164 'get':210 'give':228 'group':252 'happi':57,345 'hunger':330 'jeffrey':9 'kv':224,305 'last':273 'lead':256 'learn':151 'leav':317 'life':17 'like':327 'list':169,203,231,322 'look':326 'lot':149 'm':30,49,55,120,223,303,334,344,357,362 'manipul':45 'master':5 'meant':105 'movi':176,233,324 'movielist':226,315 'mp4':244 'much':135 'name':213 'need':112 'never':95 'nobodi':14 'o':222 'one':196,277 'overflow':92 'p4':225,304 'past':86 'period':267 'pretti':31,321 'proud':32 'pull':172 'purpos':73 'read':4 'realli':96 'recogn':145 'regex':83,142,366,380 'regular':6,38 'remov':254 'replac':282 'rip':179 'say':379 'sed':162,248,292,294 'set':36 'share':27 'sinc':13 'singl':286 'slash':258 'someth':28 'space':280,287 'stack':91 'stuff':87 'sure':335 'tar':199,218 'tarbal':175,185,208 'text':47 'thought':24 'time':118 'titl':374 'tmdbid':242 'togeth':89 'tzvf':219 'understand':66,133,365 'understood':97 'use':82,158,197,247,370 've':2,81,178 'video':216 'way':126 'wife':21 'word':270 'work':50,100 'wrote':42,62,153,193 'z':300 'z0':310 'za':309"
  +cross: false
  +upVotes: 0
  +downVotes: 0
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      \n
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    I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
    \n
    What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
    \n
    I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
    \n
    I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
    \n
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    \n
    `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
    \n
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    \n
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    - All of the periods in between words\n
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    \n
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    \n
    Edit: fixed title so it didn’t say “regex expressions”
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        From Wikipedia, the free encyclopedia\n
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        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
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        \n
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        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
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      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
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      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    Knowledge and understanding. Feels good, man.\n
    \n
    Obligatory [Xkcd](https://xkcd.com/208/).\n
    \n
    ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN
Show voter details
7 DENIED edit 
App\Entity\EntryComment {#4125
  +user: App\Entity\User {#4074 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    Knowledge and understanding. Feels good, man.\n
    \n
    Obligatory [Xkcd](https://xkcd.com/208/).\n
    \n
    ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
    """
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
8 DENIED moderate 
App\Entity\EntryComment {#4125
  +user: App\Entity\User {#4074 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +image: null
  +parent: null
  +root: null
  +body: """
    Knowledge and understanding. Feels good, man.\n
    \n
    Obligatory [Xkcd](https://xkcd.com/208/).\n
    \n
    ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
    """
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}
 
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 ACCESS ABSTAIN 
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 ACCESS DENIED 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
      \n
      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
      """
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Show voter details
11 DENIED edit 
App\Entity\EntryComment {#5314
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      - Everything from `.[` to the end\n
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      \n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
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      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      This is the full sed command:\n
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      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
      \n
      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
      \n
      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
      """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
      \n
      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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}
 
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16 DENIED moderate 
App\Entity\EntryComment {#5329
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Knowledge and understanding. Feels good, man.\n
      \n
      Obligatory [Xkcd](https://xkcd.com/208/).\n
      \n
      ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
      """
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  +body: "Ah…the days when perl was the shit and python was still a glimmer in the eye of some frustrated programmer."
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        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      +image: null
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      +body: """
        Knowledge and understanding. Feels good, man.\n
        \n
        Obligatory [Xkcd](https://xkcd.com/208/).\n
        \n
        ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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        \n
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        Obligatory [Xkcd](https://xkcd.com/208/).\n
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        \n
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        Knowledge and understanding. Feels good, man.\n
        \n
        Obligatory [Xkcd](https://xkcd.com/208/).\n
        \n
        ![](https://sh.itjust.works/pictrs/image/d6d2db0a-cf5a-4270-b4bb-a898d9b88695.png)
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    +body: "Ah…the days when perl was the shit and python was still a glimmer in the eye of some frustrated programmer."
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  +body: "[Relevant xkcd (specifically the alt text)](https://xkcd.com/353/)"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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      \n
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      \n
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      \n
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      \n
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        From Wikipedia, the free encyclopedia\n
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        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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App\Entity\EntryComment {#5451
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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27 DENIED edit 
App\Entity\EntryComment {#5451
  +user: Proxies\__CG__\App\Entity\User {#5452 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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30 DENIED moderate 
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        \n
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      \n
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      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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  +parent: null
  +root: null
  +body: """
    Good job !\n
    \n
    I highly recommend trying out the various online regex editor.\n
    \n
    These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
    \n
    I took the first one in my search results but try different ones.\n
    \n
    [regex101.com](https://regex101.com/)\n
    \n
    Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
    \n
    In that case I was building a regex for a specific log from postfix.\n
    \n
    PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
    \n
    Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
    """
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        \n
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
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        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    Good job !\n
    \n
    I highly recommend trying out the various online regex editor.\n
    \n
    These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
    \n
    I took the first one in my search results but try different ones.\n
    \n
    [regex101.com](https://regex101.com/)\n
    \n
    Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
    \n
    In that case I was building a regex for a specific log from postfix.\n
    \n
    PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
    \n
    Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
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        \n
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        \n
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        \n
        ### Rules\n
        \n
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        - No misinformation\n
        - No NSFW content\n
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
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  +body: """
    Good job !\n
    \n
    I highly recommend trying out the various online regex editor.\n
    \n
    These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
    \n
    I took the first one in my search results but try different ones.\n
    \n
    [regex101.com](https://regex101.com/)\n
    \n
    Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
    \n
    In that case I was building a regex for a specific log from postfix.\n
    \n
    PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
    \n
    Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
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    +createdAt: DateTimeImmutable @1703456898 {#4235
      date: 2023-12-24 23:28:18.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4239}
  +body: "Piggybacking onto this to mention my go-to online RegEx editor: [RegExr](https://regexr.com/). It lets you test the regex as you type, explains the particular symbols used, as well as has a sidebar where you can see different pattern types categorically. I’ve been using it for almost 2 years now, and haven’t had any reason to use much else (after I discovered this)."
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        \n
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        \n
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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  +parent: App\Entity\EntryComment {#4239
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    +magazine: App\Entity\Magazine {#266}
    +image: null
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      date: 2023-12-24 23:28:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: "Piggybacking onto this to mention my go-to online RegEx editor: [RegExr](https://regexr.com/). It lets you test the regex as you type, explains the particular symbols used, as well as has a sidebar where you can see different pattern types categorically. I’ve been using it for almost 2 years now, and haven’t had any reason to use much else (after I discovered this)."
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        \n
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +upVotes: 0
    +downVotes: 0
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    +editedAt: DateTimeImmutable @1707607314 {#1850
      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#4239
    +user: App\Entity\User {#4252 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
    ]
    +children: Doctrine\ORM\PersistentCollection {#4240 …}
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      date: 2024-02-10 18:20:08.0 +01:00
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    +createdAt: DateTimeImmutable @1703456898 {#4235
      date: 2023-12-24 23:28:18.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4239}
  +body: "Piggybacking onto this to mention my go-to online RegEx editor: [RegExr](https://regexr.com/). It lets you test the regex as you type, explains the particular symbols used, as well as has a sidebar where you can see different pattern types categorically. I’ve been using it for almost 2 years now, and haven’t had any reason to use much else (after I discovered this)."
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    "@Tetsuo@jlai.lu"
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}
 
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  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
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  +parent: App\Entity\EntryComment {#4239
    +user: App\Entity\User {#4252 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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    Thank you very much. I will definitely check out the regex builders. That’ll be super useful\n
    \n
    Edit: fix stupid autocorrect turning regex into Reyes.
    """
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Thank you very much. I will definitely check out the regex builders. That’ll be super useful\n
    \n
    Edit: fix stupid autocorrect turning regex into Reyes.
    """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#4239
    +user: App\Entity\User {#4252 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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      date: 2024-02-10 18:20:08.0 +01:00
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      date: 2023-12-24 23:28:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Thank you very much. I will definitely check out the regex builders. That’ll be super useful\n
    \n
    Edit: fix stupid autocorrect turning regex into Reyes.
    """
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    "@Tetsuo@jlai.lu"
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    "@harsh3466@lemmy.world"
    "@Tetsuo@jlai.lu"
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}
 
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    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#4239
    +user: App\Entity\User {#4252 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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  +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        - No misinformation\n
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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      "@harsh3466@lemmy.world"
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      date: 2024-02-10 18:20:08.0 +01:00
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      date: 2023-12-24 23:28:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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}
 
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +user: Proxies\__CG__\App\Entity\User {#5268 …}
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    +magazine: App\Entity\Magazine {#266}
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      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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        "@harsh3466@lemmy.world"
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        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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    +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        \n
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        \n
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +parent: App\Entity\EntryComment {#5267
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    +parent: App\Entity\EntryComment {#4239
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      +entry: App\Entity\Entry {#2412}
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      +image: null
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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        date: 2024-02-10 18:20:08.0 +01:00
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        date: 2023-12-24 23:28:18.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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  +root: App\Entity\EntryComment {#4239}
  +body: "Yes. Most things use pcre, or Perl Compatible Regular Expressions, but there are other flavors. Usually they lack features or have slightly different syntax."
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5267
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    +entry: App\Entity\Entry {#2412}
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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        date: 2024-02-10 18:20:08.0 +01:00
      }
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        date: 2023-12-24 23:28:18.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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      date: 2023-12-24 23:54:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
    \n
    Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
    \n
    *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
    \n
    From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
    \n
    Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
    """
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    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +editedAt: DateTimeImmutable @1707607314 {#1850
      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
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  +parent: App\Entity\EntryComment {#5267
    +user: Proxies\__CG__\App\Entity\User {#5268 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#4239
      +user: App\Entity\User {#4252 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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        date: 2024-02-10 18:20:08.0 +01:00
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        date: 2023-12-24 23:28:18.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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      date: 2023-12-24 23:54:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
    \n
    Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
    \n
    *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
    \n
    From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
    \n
    Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
    """
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52 DENIED moderate 
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
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  +parent: App\Entity\EntryComment {#5267
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    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#4239
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      +magazine: App\Entity\Magazine {#266}
      +image: null
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      +body: """
        Good job !\n
        \n
        I highly recommend trying out the various online regex editor.\n
        \n
        These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
        \n
        I took the first one in my search results but try different ones.\n
        \n
        [regex101.com](https://regex101.com/)\n
        \n
        Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
        \n
        In that case I was building a regex for a specific log from postfix.\n
        \n
        PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
        \n
        Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
        """
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    +root: App\Entity\EntryComment {#4239}
    +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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      "@harsh3466@lemmy.world"
      "@Tetsuo@jlai.lu"
    ]
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    -id: 249725
    -bodyTs: "'actual':27 'alreadi':51 'away':57 'baffel':53 'blow':55 'brain':17 'differ':42 'enough':25 'even':58 'everi':7 'flavor':4 'hurt':15 'know':39 'languag':54 'learn':31 'like':34 'mind':52 'need':21 'never':20 'op':35 'proper':33 'regex':6,13 'sit':28 'thing':48 'time':8 'use':12 'wait':1 'way':43"
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      date: 2023-12-24 23:54:18.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4239}
  +body: """
    Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
    \n
    Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
    \n
    *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
    \n
    From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
    \n
    Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
    """
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5555
    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5267
      +user: Proxies\__CG__\App\Entity\User {#5268 …}
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      +magazine: App\Entity\Magazine {#266}
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      +parent: App\Entity\EntryComment {#4239
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      }
      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@harsh3466@lemmy.world"
        "@Tetsuo@jlai.lu"
      ]
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      -id: 249725
      -bodyTs: "'actual':27 'alreadi':51 'away':57 'baffel':53 'blow':55 'brain':17 'differ':42 'enough':25 'even':58 'everi':7 'flavor':4 'hurt':15 'know':39 'languag':54 'learn':31 'like':34 'mind':52 'need':21 'never':20 'op':35 'proper':33 'regex':6,13 'sit':28 'thing':48 'time':8 'use':12 'wait':1 'way':43"
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      date: 2023-12-25 00:37:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: "That screen scrolling tip is gold. I’ve often used that trick to spot anomalies in data. Hadn’t considered using it to spot the patterns for regex."
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +parent: App\Entity\EntryComment {#5555
    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5267
      +user: Proxies\__CG__\App\Entity\User {#5268 …}
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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        +createdAt: DateTimeImmutable @1703456898 {#4235
          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        date: 2023-12-24 23:54:18.0 +01:00
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        "@harsh3466@lemmy.world"
        "@Tetsuo@jlai.lu"
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      "@Tetsuo@jlai.lu"
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  +root: App\Entity\EntryComment {#4239}
  +body: "That screen scrolling tip is gold. I’ve often used that trick to spot anomalies in data. Hadn’t considered using it to spot the patterns for regex."
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56 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@Tetsuo@jlai.lu"
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: "That screen scrolling tip is gold. I’ve often used that trick to spot anomalies in data. Hadn’t considered using it to spot the patterns for regex."
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +parent: App\Entity\EntryComment {#5555
    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5267
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      +parent: App\Entity\EntryComment {#4239
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@harsh3466@lemmy.world"
        "@Tetsuo@jlai.lu"
      ]
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      "@Tetsuo@jlai.lu"
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      date: 2024-02-10 17:56:55.0 +01:00
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      date: 2023-12-25 00:37:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Thanks for the comprehensive reply! I have only used it for quite simple things like getting the id’s out of log lines where this and this key word exist. Great tip about pattern searching!\n
    \n
    Merry Christmas
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5267
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@Tetsuo@jlai.lu"
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      date: 2024-02-10 17:56:55.0 +01:00
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      date: 2023-12-25 00:37:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Thanks for the comprehensive reply! I have only used it for quite simple things like getting the id’s out of log lines where this and this key word exist. Great tip about pattern searching!\n
    \n
    Merry Christmas
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +parent: App\Entity\EntryComment {#5555
    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5267
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@Tetsuo@jlai.lu"
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      date: 2024-02-10 17:56:55.0 +01:00
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      date: 2023-12-25 00:37:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Thanks for the comprehensive reply! I have only used it for quite simple things like getting the id’s out of log lines where this and this key word exist. Great tip about pattern searching!\n
    \n
    Merry Christmas
    """
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5555
    +user: Proxies\__CG__\App\Entity\User {#5556 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5267
      +user: Proxies\__CG__\App\Entity\User {#5268 …}
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      +magazine: App\Entity\Magazine {#266}
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      +parent: App\Entity\EntryComment {#4239
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        "@harsh3466@lemmy.world"
        "@Tetsuo@jlai.lu"
      ]
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      "@harsh3466@lemmy.world"
      "@Tetsuo@jlai.lu"
      "@virku@lemmy.world"
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  +body: """
    > The only one you really need to care about (especially under Linux) is PCRE,\n
    \n
    Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
    \n
    Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
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        ### Related Communities\n
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        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +slug: "My-First-Regular-Expressions"
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      date: 2024-02-10 17:56:55.0 +01:00
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  +body: """
    > The only one you really need to care about (especially under Linux) is PCRE,\n
    \n
    Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
    \n
    Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
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        - No hate speech, bigotry, etc\n
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        +body: """
          Good job !\n
          \n
          I highly recommend trying out the various online regex editor.\n
          \n
          These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
          \n
          I took the first one in my search results but try different ones.\n
          \n
          [regex101.com](https://regex101.com/)\n
          \n
          Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
          \n
          In that case I was building a regex for a specific log from postfix.\n
          \n
          PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
          \n
          Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
          """
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          date: 2024-02-10 18:20:08.0 +01:00
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          date: 2023-12-24 23:28:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
      \n
      Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
      \n
      *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
      \n
      From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
      \n
      Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
      """
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      date: 2024-02-10 17:56:55.0 +01:00
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    +createdAt: DateTimeImmutable @1703461044 {#5554
      date: 2023-12-25 00:37:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    > The only one you really need to care about (especially under Linux) is PCRE,\n
    \n
    Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
    \n
    Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
    """
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +parent: App\Entity\EntryComment {#5686
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          +body: """
            Good job !\n
            \n
            I highly recommend trying out the various online regex editor.\n
            \n
            These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
            \n
            I took the first one in my search results but try different ones.\n
            \n
            [regex101.com](https://regex101.com/)\n
            \n
            Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
            \n
            In that case I was building a regex for a specific log from postfix.\n
            \n
            PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
            \n
            Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
            """
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            date: 2023-12-24 23:28:18.0 +01:00
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        +root: App\Entity\EntryComment {#4239}
        +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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          "@Tetsuo@jlai.lu"
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      +root: App\Entity\EntryComment {#4239}
      +body: """
        Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
        \n
        Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
        \n
        *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
        \n
        From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
        \n
        Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
        """
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        date: 2024-02-10 17:56:55.0 +01:00
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        date: 2023-12-25 00:37:24.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      > The only one you really need to care about (especially under Linux) is PCRE,\n
      \n
      Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
      \n
      Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
      """
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      date: 2023-12-26 09:31:24.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    POSIX? Never heard of her.\n
    \n
    While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
    """
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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          +body: """
            Good job !\n
            \n
            I highly recommend trying out the various online regex editor.\n
            \n
            These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
            \n
            I took the first one in my search results but try different ones.\n
            \n
            [regex101.com](https://regex101.com/)\n
            \n
            Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
            \n
            In that case I was building a regex for a specific log from postfix.\n
            \n
            PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
            \n
            Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
            """
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            date: 2024-02-10 18:20:08.0 +01:00
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        +root: App\Entity\EntryComment {#4239}
        +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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      +root: App\Entity\EntryComment {#4239}
      +body: """
        Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
        \n
        Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
        \n
        *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
        \n
        From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
        \n
        Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
        """
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      > The only one you really need to care about (especially under Linux) is PCRE,\n
      \n
      Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
      \n
      Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    POSIX? Never heard of her.\n
    \n
    While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
    """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        \n
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        - No misinformation\n
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          +body: """
            Good job !\n
            \n
            I highly recommend trying out the various online regex editor.\n
            \n
            These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
            \n
            I took the first one in my search results but try different ones.\n
            \n
            [regex101.com](https://regex101.com/)\n
            \n
            Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
            \n
            In that case I was building a regex for a specific log from postfix.\n
            \n
            PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
            \n
            Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
            """
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            date: 2024-02-10 18:20:08.0 +01:00
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            date: 2023-12-24 23:28:18.0 +01:00
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        }
        +root: App\Entity\EntryComment {#4239}
        +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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          "@Tetsuo@jlai.lu"
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          date: 2023-12-24 23:54:18.0 +01:00
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      +root: App\Entity\EntryComment {#4239}
      +body: """
        Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
        \n
        Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
        \n
        *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
        \n
        From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
        \n
        Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
        """
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      +editedAt: DateTimeImmutable @1707584215 {#5553
        date: 2024-02-10 17:56:55.0 +01:00
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      +createdAt: DateTimeImmutable @1703461044 {#5554
        date: 2023-12-25 00:37:24.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      > The only one you really need to care about (especially under Linux) is PCRE,\n
      \n
      Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
      \n
      Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
      """
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      "@virku@lemmy.world"
      "@remotelove@lemmy.ca"
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      date: 2024-02-14 02:28:52.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    POSIX? Never heard of her.\n
    \n
    While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
    """
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App\Entity\EntryComment {#5804
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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            +body: """
              Good job !\n
              \n
              I highly recommend trying out the various online regex editor.\n
              \n
              These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
              \n
              I took the first one in my search results but try different ones.\n
              \n
              [regex101.com](https://regex101.com/)\n
              \n
              Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
              \n
              In that case I was building a regex for a specific log from postfix.\n
              \n
              PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
              \n
              Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
              """
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          +root: App\Entity\EntryComment {#4239}
          +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        +root: App\Entity\EntryComment {#4239}
        +body: """
          Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
          \n
          Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
          \n
          *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
          \n
          From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
          \n
          Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
          """
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      +body: """
        > The only one you really need to care about (especially under Linux) is PCRE,\n
        \n
        Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
        \n
        Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
        """
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    +body: """
      POSIX? Never heard of her.\n
      \n
      While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: "Perl has introduced powerful backtracking regexes that were widely adopted. However they can be damn slow in some cases, that’s why RE2 refused backtracking while using some perl-like elements. Both basic and extended POSIX regexes are also non-backtracking because they are older than perl."
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App\Entity\EntryComment {#5804
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
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        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
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        - No hate speech, bigotry, etc\n
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        ### Related Communities\n
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        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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            +body: """
              Good job !\n
              \n
              I highly recommend trying out the various online regex editor.\n
              \n
              These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
              \n
              I took the first one in my search results but try different ones.\n
              \n
              [regex101.com](https://regex101.com/)\n
              \n
              Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
              \n
              In that case I was building a regex for a specific log from postfix.\n
              \n
              PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
              \n
              Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
              """
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          +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        +root: App\Entity\EntryComment {#4239}
        +body: """
          Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
          \n
          Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
          \n
          *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
          \n
          From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
          \n
          Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
          """
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      +body: """
        > The only one you really need to care about (especially under Linux) is PCRE,\n
        \n
        Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
        \n
        Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
        """
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    +body: """
      POSIX? Never heard of her.\n
      \n
      While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
      """
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  +body: "Perl has introduced powerful backtracking regexes that were widely adopted. However they can be damn slow in some cases, that’s why RE2 refused backtracking while using some perl-like elements. Both basic and extended POSIX regexes are also non-backtracking because they are older than perl."
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      +parent: App\Entity\EntryComment {#5555
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            +body: """
              Good job !\n
              \n
              I highly recommend trying out the various online regex editor.\n
              \n
              These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
              \n
              I took the first one in my search results but try different ones.\n
              \n
              [regex101.com](https://regex101.com/)\n
              \n
              Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
              \n
              In that case I was building a regex for a specific log from postfix.\n
              \n
              PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
              \n
              Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
              """
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          +root: App\Entity\EntryComment {#4239}
          +body: "Wait. Are there flavors of regex? Every time I have to use regex it hurts my brain and I never need to do it enough to actually sit down and learn it properly like OP is doing. Just knowing there are different ways of doing the same things in an already mind baffeling language blows me away even more."
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        +root: App\Entity\EntryComment {#4239}
        +body: """
          Yeah. The only one you really need to care about (especially under Linux) is PCRE, the good 'ol Perl Compatible Regular Expressions. For the most part, every other flavor is a derivative of that. Microsoft had a weird version for a while, but that may be completely dead now, thankfully.\n
          \n
          Learning the syntax of regex is fairly easy. Hell, I still have to use this [cheat sheet](https://zoovio.com/image/view/G7) more often now that my perl skills are no longer needed or even relevant.\n
          \n
          *Regex isn’t that hard.* The challenge is identifying and understanding patterns in the data that you are filtering. Here is a brain hack: As an example, if to have pages and pages of logs that you need to filter, open up one of the log files, stare at the screen and hold the page down key for several dozen pages. Patterns can be easily seen in the blur of text that is quickly scrolling across the screen. (Our brains *love* to find patterns in noise, btw.) The patterns that you see will give you focus points for developing regular expressions to match. ie: You start breaking strings into chunks and seeing the ebb and flow of data streaming across a screen helps. Anomalies in the data “stream” are are easy to spot as well.\n
          \n
          From a [security and efficiency standpoint](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS), you should also understand where the most processing takes place so you don’t kill whatever platform you are working on.\n
          \n
          Sorry for the rambling, but I am getting older and feel the need to pass on a ton of tips and tricks whenever I can for these “archaic” languages.
          """
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      +body: """
        > The only one you really need to care about (especially under Linux) is PCRE,\n
        \n
        Well, no. `sed`, `grep`, `awk`, `vi` etc. use POSIX regexes. GNU implementations also provide perl compatible mode via an unportable option. In modern programming languages like go and rust standard regex engines are compatible to RE2 - relatively new dialect developed in Google that is not described in the Friedl’s book (you may think of it as an extension of extended POSIX dialect). Even raku has its own dialect incompatible to perl as well as other ones.\n
        \n
        Nowadays it is common to move away from perl-like engines, however they are still widely used in PCRE based software and software written in python, JS etc.
        """
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        date: 2024-02-14 02:28:52.0 +01:00
      }
      +createdAt: DateTimeImmutable @1703579484 {#5685
        date: 2023-12-26 09:31:24.0 +01:00
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    +root: App\Entity\EntryComment {#4239}
    +body: """
      POSIX? Never heard of her.\n
      \n
      While you are likely 100% correct, the legacy perl developer side of me is making nasty comments to you with illegible syntax.
      """
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      date: 2023-12-26 11:43:27.0 +01:00
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      "@harsh3466@lemmy.world"
      "@Tetsuo@jlai.lu"
      "@virku@lemmy.world"
      "@remotelove@lemmy.ca"
      "@bizdelnick@lemmy.ml"
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    +createdAt: DateTimeImmutable @1703587407 {#5753
      date: 2023-12-26 11:43:27.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4239}
  +body: "Perl has introduced powerful backtracking regexes that were widely adopted. However they can be damn slow in some cases, that’s why RE2 refused backtracking while using some perl-like elements. Both basic and extended POSIX regexes are also non-backtracking because they are older than perl."
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    "@Tetsuo@jlai.lu"
    "@virku@lemmy.world"
    "@remotelove@lemmy.ca"
    "@bizdelnick@lemmy.ml"
  ]
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}
 
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74 DENIED moderate 
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  +user: Proxies\__CG__\App\Entity\User {#1970 …}
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      +apPreferredUsername: "linux"
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        date: 2024-10-22 09:53:16.0 +02:00
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +editedAt: DateTimeImmutable @1707607314 {#1850
      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
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    +user: App\Entity\User {#4252 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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    +ranking: 0
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      date: 2024-02-10 18:20:08.0 +01:00
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      date: 2023-12-24 23:28:18.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4239}
  +body: "Computerphile! I’ll check those out."
  +lang: "en"
  +isAdult: false
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  +score: 0
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    date: 2023-12-25 03:36:35.0 +01:00
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    "@harsh3466@lemmy.world"
    "@Tetsuo@jlai.lu"
  ]
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    date: 2023-12-25 03:36:35.0 +01:00
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}
 
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75 DENIED edit 
App\Entity\EntryComment {#5283
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +url: null
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: "Computerphile! I’ll check those out."
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76 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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  +body: "Computerphile! I’ll check those out."
  +lang: "en"
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}
 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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    +ranking: 0
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    +editedAt: DateTimeImmutable @1707585608 {#4234
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    +createdAt: DateTimeImmutable @1703456898 {#4235
      date: 2023-12-24 23:28:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Regex101 is amazing. It tends to balk at backtracing which we rely on a lot for work, but it’s such a good visual.\n
    \n
    Chat GPT can also save a lot of time writing regex, but it tends to write very unreadable regex because it thinks it’s being clever when it really isnt.\n
    \n
    Regex is an art form, and writing readable regex is another step above that.
    """
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}
 
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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      date: 2024-02-10 18:20:08.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456898 {#4235
      date: 2023-12-24 23:28:18.0 +01:00
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Regex101 is amazing. It tends to balk at backtracing which we rely on a lot for work, but it’s such a good visual.\n
    \n
    Chat GPT can also save a lot of time writing regex, but it tends to write very unreadable regex because it thinks it’s being clever when it really isnt.\n
    \n
    Regex is an art form, and writing readable regex is another step above that.
    """
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +magazine: App\Entity\Magazine {#266}
    +image: null
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    +body: """
      Good job !\n
      \n
      I highly recommend trying out the various online regex editor.\n
      \n
      These WISIWIG kind of editors are great because you immediately see what the regex is catching and for what reason.\n
      \n
      I took the first one in my search results but try different ones.\n
      \n
      [regex101.com](https://regex101.com/)\n
      \n
      Also I used GPT to get some regex for some specific strings and it can be helpful to get a quickstart at building a specific regex.\n
      \n
      In that case I was building a regex for a specific log from postfix.\n
      \n
      PS: just make sure to select the correct *flavor* of regex you are using in these online tools.\n
      \n
      Edit: Also one of my favorite YT channels has pretty cool videos on RegEx : [youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU](https://youtu.be/6gddK-cOxYc?si=0bnNkSDzifjdxwjU)
      """
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  +root: App\Entity\EntryComment {#4239}
  +body: """
    Regex101 is amazing. It tends to balk at backtracing which we rely on a lot for work, but it’s such a good visual.\n
    \n
    Chat GPT can also save a lot of time writing regex, but it tends to write very unreadable regex because it thinks it’s being clever when it really isnt.\n
    \n
    Regex is an art form, and writing readable regex is another step above that.
    """
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        \n
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        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
    \n
    Some notes on you script:\n
    \n
    1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
    2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
    3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
    \n
    So I would do the same with\n
    \n
    ```\n
    \n
    <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
    </span>\n
    ```
    """
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83 DENIED edit 
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
    \n
    Some notes on you script:\n
    \n
    1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
    2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
    3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
    \n
    So I would do the same with\n
    \n
    ```\n
    \n
    <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
    </span>\n
    ```
    """
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84 DENIED moderate 
App\Entity\EntryComment {#4313
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    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
    \n
    Some notes on you script:\n
    \n
    1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
    2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
    3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
    \n
    So I would do the same with\n
    \n
    ```\n
    \n
    <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
    </span>\n
    ```
    """
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Show voter details
85 DENIED ROLE_USER 
null
 
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Show voter details
86 DENIED moderate 
App\Entity\EntryComment {#5499
  +user: Proxies\__CG__\App\Entity\User {#5500 …}
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
      \n
      Some notes on you script:\n
      \n
      1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
      2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
      3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
      \n
      So I would do the same with\n
      \n
      ```\n
      \n
      <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
      </span>\n
      ```
      """
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
    \n
    Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
    \n
    Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
    """
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      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
      \n
      Some notes on you script:\n
      \n
      1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
      2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
      3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
      \n
      So I would do the same with\n
      \n
      ```\n
      \n
      <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
      </span>\n
      ```
      """
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      date: 2024-02-16 21:09:53.0 +01:00
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      "323232"
    ]
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
    ]
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    +ranking: 0
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    +visibility: "visible             "
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    +editedAt: DateTimeImmutable @1707737027 {#4308
      date: 2024-02-12 12:23:47.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703524389 {#4309
      date: 2023-12-25 18:13:09.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
    \n
    Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
    \n
    Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
    """
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    "@harsh3466@lemmy.world"
    "@bizdelnick@lemmy.ml"
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}
 
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  +user: Proxies\__CG__\App\Entity\User {#5500 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
    }
  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#4313
    +user: App\Entity\User {#4326 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
      \n
      Some notes on you script:\n
      \n
      1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
      2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
      3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
      \n
      So I would do the same with\n
      \n
      ```\n
      \n
      <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
      </span>\n
      ```
      """
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    ]
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      "@harsh3466@lemmy.world"
      "@harsh3466@lemmy.world"
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    +ranking: 0
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    +visibility: "visible             "
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    +editedAt: DateTimeImmutable @1707737027 {#4308
      date: 2024-02-12 12:23:47.0 +01:00
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    +createdAt: DateTimeImmutable @1703524389 {#4309
      date: 2023-12-25 18:13:09.0 +01:00
    }
  }
  +root: App\Entity\EntryComment {#4313}
  +body: """
    > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
    \n
    Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
    \n
    Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
    """
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    "@harsh3466@lemmy.world"
    "@bizdelnick@lemmy.ml"
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}
 
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Show voter details
89 DENIED ROLE_USER 
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Show voter details
90 DENIED moderate 
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        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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  +image: null
  +parent: App\Entity\EntryComment {#5499
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#4313
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
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      +root: null
      +body: """
        It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
        \n
        Some notes on you script:\n
        \n
        1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
        2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
        3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
        \n
        So I would do the same with\n
        \n
        ```\n
        \n
        <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
        </span>\n
        ```
        """
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        "323232"
      ]
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        "@harsh3466@lemmy.world"
        "@harsh3466@lemmy.world"
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        date: 2023-12-25 18:13:09.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
      \n
      Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
      \n
      Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
      """
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
    """
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5499
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#4313
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: null
      +root: null
      +body: """
        It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
        \n
        Some notes on you script:\n
        \n
        1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
        2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
        3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
        \n
        So I would do the same with\n
        \n
        ```\n
        \n
        <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
        </span>\n
        ```
        """
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        date: 2024-02-16 21:09:53.0 +01:00
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        "323232"
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        "@harsh3466@lemmy.world"
        "@harsh3466@lemmy.world"
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      }
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        date: 2023-12-25 18:13:09.0 +01:00
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    }
    +root: App\Entity\EntryComment {#4313}
    +body: """
      > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
      \n
      Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
      \n
      Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
      """
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      date: 2023-12-26 12:37:26.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
    """
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92 DENIED moderate 
App\Entity\EntryComment {#5618
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5499
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#4313
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: null
      +root: null
      +body: """
        It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
        \n
        Some notes on you script:\n
        \n
        1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
        2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
        3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
        \n
        So I would do the same with\n
        \n
        ```\n
        \n
        <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
        </span>\n
        ```
        """
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        date: 2024-02-16 21:09:53.0 +01:00
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        "323232"
      ]
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        "@harsh3466@lemmy.world"
        "@harsh3466@lemmy.world"
      ]
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      +editedAt: DateTimeImmutable @1707737027 {#4308
        date: 2024-02-12 12:23:47.0 +01:00
      }
      +createdAt: DateTimeImmutable @1703524389 {#4309
        date: 2023-12-25 18:13:09.0 +01:00
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    }
    +root: App\Entity\EntryComment {#4313}
    +body: """
      > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
      \n
      Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
      \n
      Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
      """
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      date: 2023-12-26 12:37:26.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4313}
  +body: """
    GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
    """
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}
 
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App\Entity\EntryComment {#5717
  +user: Proxies\__CG__\App\Entity\User {#5500 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
    }
  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5618
    +user: App\Entity\User {#4326 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5499
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#4313
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: null
        +root: null
        +body: """
          It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
          \n
          Some notes on you script:\n
          \n
          1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
          2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
          3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
          \n
          So I would do the same with\n
          \n
          ```\n
          \n
          <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
          </span>\n
          ```
          """
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          "323232"
        ]
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          "@harsh3466@lemmy.world"
          "@harsh3466@lemmy.world"
        ]
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        +ranking: 0
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        +editedAt: DateTimeImmutable @1707737027 {#4308
          date: 2024-02-12 12:23:47.0 +01:00
        }
        +createdAt: DateTimeImmutable @1703524389 {#4309
          date: 2023-12-25 18:13:09.0 +01:00
        }
      }
      +root: App\Entity\EntryComment {#4313}
      +body: """
        > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
        \n
        Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
        \n
        Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
        """
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      +isAdult: false
      +favouriteCount: 8
      +score: 0
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        date: 2023-12-26 12:37:26.0 +01:00
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      +ip: null
      +tags: null
      +mentions: [
        "@harsh3466@lemmy.world"
        "@bizdelnick@lemmy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#5501 …}
      +nested: Doctrine\ORM\PersistentCollection {#5503 …}
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
      """
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      date: 2023-12-26 18:51:08.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
    \n
    You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
    \n
    In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
    \n
    So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
    \n
    > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
    \n
    Good for you. Do you want a cookie or something?
    """
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App\Entity\EntryComment {#5717
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5618
    +user: App\Entity\User {#4326 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5499
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#4313
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
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        +body: """
          It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
          \n
          Some notes on you script:\n
          \n
          1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
          2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
          3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
          \n
          So I would do the same with\n
          \n
          ```\n
          \n
          <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
          </span>\n
          ```
          """
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          date: 2023-12-25 18:13:09.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
        \n
        Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
        \n
        Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
        """
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
      """
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    -id: 254226
    -bodyTs: "'also':41 'backward':32 'bashism':48 'command':69 'compat':33 'correspond':29 'distribut':16 'document':40 'egrep':10 'fgrep':11 'full':46 'gnu':1 'gnuism':49 'grep':2,27 'implement':6 'includ':9 'ism':53 'keep':57 'learn':36 'linux':50 'mani':20 'necessari':64 'offici':39 'option':30 'portabl':59 'provid':21 'realli':63 'rgrep':13 'run':26 'script':23,43 'shell':22 'simpli':25 'syntax':71 'tri':55 'unless':60 'unport':68 'use':66 'widespread':5 'year':15"
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      date: 2023-12-26 18:51:08.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
    \n
    You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
    \n
    In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
    \n
    So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
    \n
    > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
    \n
    Good for you. Do you want a cookie or something?
    """
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96 DENIED moderate 
App\Entity\EntryComment {#5717
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5618
    +user: App\Entity\User {#4326 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5499
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#4313
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
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        +body: """
          It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
          \n
          Some notes on you script:\n
          \n
          1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
          2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
          3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
          \n
          So I would do the same with\n
          \n
          ```\n
          \n
          <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
          </span>\n
          ```
          """
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          "323232"
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          "@harsh3466@lemmy.world"
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        }
        +createdAt: DateTimeImmutable @1703524389 {#4309
          date: 2023-12-25 18:13:09.0 +01:00
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      }
      +root: App\Entity\EntryComment {#4313}
      +body: """
        > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
        \n
        Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
        \n
        Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
        """
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
      """
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      date: 2023-12-26 18:51:08.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
    \n
    It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
    \n
    You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
    \n
    In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
    \n
    So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
    \n
    > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
    \n
    Good for you. Do you want a cookie or something?
    """
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App\Entity\EntryComment {#5769
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5717
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5618
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5499
        +user: Proxies\__CG__\App\Entity\User {#5500 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#4313
          +user: App\Entity\User {#4326 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: null
          +root: null
          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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            "323232"
          ]
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            "@harsh3466@lemmy.world"
            "@harsh3466@lemmy.world"
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          +createdAt: DateTimeImmutable @1703524389 {#4309
            date: 2023-12-25 18:13:09.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
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        date: 2023-12-26 18:51:08.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > It seems you need to read the official documentation yourself.\n
    \n
    I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
    \n
    I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
    """
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App\Entity\EntryComment {#5769
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      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +parent: App\Entity\EntryComment {#5717
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    +entry: App\Entity\Entry {#2412}
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    +parent: App\Entity\EntryComment {#5618
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      +entry: App\Entity\Entry {#2412}
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      +image: null
      +parent: App\Entity\EntryComment {#5499
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          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
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        date: 2023-12-26 18:51:08.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > It seems you need to read the official documentation yourself.\n
    \n
    I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
    \n
    I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
    """
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        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
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        \n
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        - No misinformation\n
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        - No hate speech, bigotry, etc\n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5717
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5618
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5499
        +user: Proxies\__CG__\App\Entity\User {#5500 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#4313
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          +image: null
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          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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            date: 2024-02-16 21:09:53.0 +01:00
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            "323232"
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            date: 2024-02-12 12:23:47.0 +01:00
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            date: 2023-12-25 18:13:09.0 +01:00
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        }
        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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          date: 2023-12-26 12:37:26.0 +01:00
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      }
      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
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        date: 2023-12-26 18:51:08.0 +01:00
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        "@bizdelnick@lemmy.ml"
        "@SpaceCadet@feddit.nl"
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        date: 2023-12-26 18:51:08.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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      date: 2024-02-16 03:30:44.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > It seems you need to read the official documentation yourself.\n
    \n
    I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
    \n
    I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
    """
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App\Entity\EntryComment {#5823
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    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +parent: App\Entity\EntryComment {#5769
    +user: App\Entity\User {#4326 …}
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    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5717
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5618
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#5499
          +user: Proxies\__CG__\App\Entity\User {#5500 …}
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          +magazine: App\Entity\Magazine {#266}
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          +parent: App\Entity\EntryComment {#4313
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            +entry: App\Entity\Entry {#2412}
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            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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              date: 2024-02-16 21:09:53.0 +01:00
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              "323232"
            ]
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              "@harsh3466@lemmy.world"
              "@harsh3466@lemmy.world"
            ]
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            +editedAt: DateTimeImmutable @1707737027 {#4308
              date: 2024-02-12 12:23:47.0 +01:00
            }
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              date: 2023-12-25 18:13:09.0 +01:00
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          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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            date: 2023-12-26 12:37:26.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          date: 2023-12-26 18:51:08.0 +01:00
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          "@harsh3466@lemmy.world"
          "@bizdelnick@lemmy.ml"
          "@SpaceCadet@feddit.nl"
        ]
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        -bodyTs: "'also':41 'backward':32 'bashism':48 'command':69 'compat':33 'correspond':29 'distribut':16 'document':40 'egrep':10 'fgrep':11 'full':46 'gnu':1 'gnuism':49 'grep':2,27 'implement':6 'includ':9 'ism':53 'keep':57 'learn':36 'linux':50 'mani':20 'necessari':64 'offici':39 'option':30 'portabl':59 'provid':21 'realli':63 'rgrep':13 'run':26 'script':23,43 'shell':22 'simpli':25 'syntax':71 'tri':55 'unless':60 'unport':68 'use':66 'widespread':5 'year':15"
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        date: 2024-02-16 03:30:44.0 +01:00
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        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > It seems you need to read the official documentation yourself.\n
      \n
      I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
      \n
      I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
      """
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      date: 2023-12-26 21:00:36.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    You are strawmanning, and your links are not countering any point I made. I never disputed the depreciation as fact, and I never recommended that beginners should use `egrep` over `grep -E`\n
    \n
    I disputed your claims that the `egrep` command has *just* been a distro hack all these years, when in fact GNU to this day still distributes `egrep` through its source tarballs and only very recently started to warn about it through the wrapper script. And again, the only “portability problem” here is the fact that they deprecated it in the first place, i.e. a self-inflicted one.\n
    \n
    Then as a Linux and Unix veteran I gave my subjective opinion by lamenting and criticizing the fact that this depreciation happened, and how changes like this always feel like unnecessary pedantry to me. Yes it’s an expression of frustration, but I am allowed to feel frustrated about it. I don’t need people like you invalidating how I feel about breaking changes in software that I use daily.
    """
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      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +user: App\Entity\User {#4326 …}
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    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5717
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      +magazine: App\Entity\Magazine {#266}
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      +parent: App\Entity\EntryComment {#5618
        +user: App\Entity\User {#4326 …}
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            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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            date: 2023-12-26 12:37:26.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          date: 2023-12-26 18:51:08.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        date: 2024-02-16 03:30:44.0 +01:00
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        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > It seems you need to read the official documentation yourself.\n
      \n
      I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
      \n
      I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
      """
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      date: 2023-12-26 21:00:36.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    You are strawmanning, and your links are not countering any point I made. I never disputed the depreciation as fact, and I never recommended that beginners should use `egrep` over `grep -E`\n
    \n
    I disputed your claims that the `egrep` command has *just* been a distro hack all these years, when in fact GNU to this day still distributes `egrep` through its source tarballs and only very recently started to warn about it through the wrapper script. And again, the only “portability problem” here is the fact that they deprecated it in the first place, i.e. a self-inflicted one.\n
    \n
    Then as a Linux and Unix veteran I gave my subjective opinion by lamenting and criticizing the fact that this depreciation happened, and how changes like this always feel like unnecessary pedantry to me. Yes it’s an expression of frustration, but I am allowed to feel frustrated about it. I don’t need people like you invalidating how I feel about breaking changes in software that I use daily.
    """
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104 DENIED moderate 
App\Entity\EntryComment {#5823
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
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    +parent: App\Entity\EntryComment {#5717
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      +magazine: App\Entity\Magazine {#266}
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      +parent: App\Entity\EntryComment {#5618
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            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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              date: 2024-02-16 21:09:53.0 +01:00
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              date: 2023-12-25 18:13:09.0 +01:00
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          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          date: 2023-12-26 18:51:08.0 +01:00
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          date: 2023-12-26 18:51:08.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        date: 2024-02-16 03:30:44.0 +01:00
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      +createdAt: DateTimeImmutable @1703616235 {#5716
        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > It seems you need to read the official documentation yourself.\n
      \n
      I did. [Debian man page](https://manpages.debian.org/bookworm/grep/grep.1.en.html), [GNU grep manual](https://www.gnu.org/software/grep/manual/html_node/Usage.html).\n
      \n
      I’m sorry for your loss, however the egrep deprecation is a fact. Of course you can continue using it as a veteran, but it is not correct to recommend this to beginners.
      """
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    You are strawmanning, and your links are not countering any point I made. I never disputed the depreciation as fact, and I never recommended that beginners should use `egrep` over `grep -E`\n
    \n
    I disputed your claims that the `egrep` command has *just* been a distro hack all these years, when in fact GNU to this day still distributes `egrep` through its source tarballs and only very recently started to warn about it through the wrapper script. And again, the only “portability problem” here is the fact that they deprecated it in the first place, i.e. a self-inflicted one.\n
    \n
    Then as a Linux and Unix veteran I gave my subjective opinion by lamenting and criticizing the fact that this depreciation happened, and how changes like this always feel like unnecessary pedantry to me. Yes it’s an expression of frustration, but I am allowed to feel frustrated about it. I don’t need people like you invalidating how I feel about breaking changes in software that I use daily.
    """
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App\Entity\EntryComment {#5784
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5717
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5618
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5499
        +user: Proxies\__CG__\App\Entity\User {#5500 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#4313
          +user: App\Entity\User {#4326 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: null
          +root: null
          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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            date: 2024-02-16 21:09:53.0 +01:00
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            "323232"
          ]
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            "@harsh3466@lemmy.world"
            "@harsh3466@lemmy.world"
          ]
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            date: 2024-02-12 12:23:47.0 +01:00
          }
          +createdAt: DateTimeImmutable @1703524389 {#4309
            date: 2023-12-25 18:13:09.0 +01:00
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        }
        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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          "@bizdelnick@lemmy.ml"
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          date: 2023-12-26 12:37:26.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
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        date: 2023-12-26 18:51:08.0 +01:00
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        "@harsh3466@lemmy.world"
        "@bizdelnick@lemmy.ml"
        "@SpaceCadet@feddit.nl"
      ]
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        date: 2023-12-26 18:51:08.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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    +createdAt: DateTimeImmutable @1703616235 {#5716
      date: 2023-12-26 19:43:55.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > Good for you. Do you want a cookie or something?\n
    \n
    I don’t know about that guy but you need a chill-pill dude.
    """
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107 DENIED edit 
App\Entity\EntryComment {#5784
  +user: Proxies\__CG__\App\Entity\User {#5785 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5717
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5618
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5499
        +user: Proxies\__CG__\App\Entity\User {#5500 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#4313
          +user: App\Entity\User {#4326 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: null
          +root: null
          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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            date: 2024-02-16 21:09:53.0 +01:00
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            "323232"
          ]
          +mentions: [
            "@harsh3466@lemmy.world"
            "@harsh3466@lemmy.world"
          ]
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          +editedAt: DateTimeImmutable @1707737027 {#4308
            date: 2024-02-12 12:23:47.0 +01:00
          }
          +createdAt: DateTimeImmutable @1703524389 {#4309
            date: 2023-12-25 18:13:09.0 +01:00
          }
        }
        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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          date: 2023-12-26 12:37:26.0 +01:00
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          "@harsh3466@lemmy.world"
          "@bizdelnick@lemmy.ml"
        ]
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          date: 2023-12-26 12:37:26.0 +01:00
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      }
      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
      +lang: "en"
      +isAdult: false
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        date: 2023-12-26 18:51:08.0 +01:00
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        "@harsh3466@lemmy.world"
        "@bizdelnick@lemmy.ml"
        "@SpaceCadet@feddit.nl"
      ]
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      -id: 254226
      -bodyTs: "'also':41 'backward':32 'bashism':48 'command':69 'compat':33 'correspond':29 'distribut':16 'document':40 'egrep':10 'fgrep':11 'full':46 'gnu':1 'gnuism':49 'grep':2,27 'implement':6 'includ':9 'ism':53 'keep':57 'learn':36 'linux':50 'mani':20 'necessari':64 'offici':39 'option':30 'portabl':59 'provid':21 'realli':63 'rgrep':13 'run':26 'script':23,43 'shell':22 'simpli':25 'syntax':71 'tri':55 'unless':60 'unport':68 'use':66 'widespread':5 'year':15"
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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      date: 2023-12-26 19:43:55.0 +01:00
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      "@bizdelnick@lemmy.ml"
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      date: 2024-02-16 03:30:44.0 +01:00
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      date: 2023-12-26 19:43:55.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    > Good for you. Do you want a cookie or something?\n
    \n
    I don’t know about that guy but you need a chill-pill dude.
    """
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108 DENIED moderate 
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2023-12-24 23:15:31.0 +01:00
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  +image: null
  +parent: App\Entity\EntryComment {#5717
    +user: Proxies\__CG__\App\Entity\User {#5500 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5618
      +user: App\Entity\User {#4326 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5499
        +user: Proxies\__CG__\App\Entity\User {#5500 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#4313
          +user: App\Entity\User {#4326 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
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          +body: """
            It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
            \n
            Some notes on you script:\n
            \n
            1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
            2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
            3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
            \n
            So I would do the same with\n
            \n
            ```\n
            \n
            <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
            </span>\n
            ```
            """
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            "323232"
          ]
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            "@harsh3466@lemmy.world"
            "@harsh3466@lemmy.world"
          ]
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            date: 2023-12-25 18:13:09.0 +01:00
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        }
        +root: App\Entity\EntryComment {#4313}
        +body: """
          > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
          \n
          Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
          \n
          Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
          """
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          "@bizdelnick@lemmy.ml"
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
        """
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        date: 2023-12-26 18:51:08.0 +01:00
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        "@harsh3466@lemmy.world"
        "@bizdelnick@lemmy.ml"
        "@SpaceCadet@feddit.nl"
      ]
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      +editedAt: null
      +createdAt: DateTimeImmutable @1703613068 {#5617
        date: 2023-12-26 18:51:08.0 +01:00
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    }
    +root: App\Entity\EntryComment {#4313}
    +body: """
      > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
      \n
      It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
      \n
      You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
      \n
      In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
      \n
      So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
      \n
      > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
      \n
      Good for you. Do you want a cookie or something?
      """
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    +isAdult: false
    +favouriteCount: 3
    +score: 0
    +lastActive: DateTime @1703616235 {#5714
      date: 2023-12-26 19:43:55.0 +01:00
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      "@harsh3466@lemmy.world"
      "@bizdelnick@lemmy.ml"
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      "@harsh3466@lemmy.world"
      "@bizdelnick@lemmy.ml"
      "@SpaceCadet@feddit.nl"
      "@harsh3466@lemmy.world"
      "@bizdelnick@lemmy.ml"
      "@SpaceCadet@feddit.nl"
      "@harsh3466@lemmy.world"
      "@bizdelnick@lemmy.ml"
      "@SpaceCadet@feddit.nl"
    ]
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    +ranking: 0
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      date: 2024-02-16 03:30:44.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703616235 {#5716
      date: 2023-12-26 19:43:55.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4313}
  +body: """
    > Good for you. Do you want a cookie or something?\n
    \n
    I don’t know about that guy but you need a chill-pill dude.
    """
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    date: 2023-12-26 22:10:42.0 +01:00
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    "@bizdelnick@lemmy.ml"
    "@SpaceCadet@feddit.nl"
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  -bodyTs: "'chill':23 'chill-pil':22 'cooki':8 'dude':25 'good':1 'guy':17 'know':14 'need':20 'pill':24 'someth':10 'want':6"
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    date: 2023-12-26 22:10:42.0 +01:00
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}
 
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App\Entity\EntryComment {#5839
  +user: Proxies\__CG__\App\Entity\User {#5500 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
    }
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      date: 2023-12-24 23:15:31.0 +01:00
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  }
  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5784
    +user: Proxies\__CG__\App\Entity\User {#5785 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5717
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5618
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#5499
          +user: Proxies\__CG__\App\Entity\User {#5500 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: App\Entity\EntryComment {#4313
            +user: App\Entity\User {#4326 …}
            +entry: App\Entity\Entry {#2412}
            +magazine: App\Entity\Magazine {#266}
            +image: null
            +parent: null
            +root: null
            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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              date: 2024-02-16 21:09:53.0 +01:00
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            +tags: [
              "323232"
            ]
            +mentions: [
              "@harsh3466@lemmy.world"
              "@harsh3466@lemmy.world"
            ]
            +children: Doctrine\ORM\PersistentCollection {#4314 …}
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            +editedAt: DateTimeImmutable @1707737027 {#4308
              date: 2024-02-12 12:23:47.0 +01:00
            }
            +createdAt: DateTimeImmutable @1703524389 {#4309
              date: 2023-12-25 18:13:09.0 +01:00
            }
          }
          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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            date: 2023-12-26 12:37:26.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          "@bizdelnick@lemmy.ml"
          "@SpaceCadet@feddit.nl"
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        -bodyTs: "'also':41 'backward':32 'bashism':48 'command':69 'compat':33 'correspond':29 'distribut':16 'document':40 'egrep':10 'fgrep':11 'full':46 'gnu':1 'gnuism':49 'grep':2,27 'implement':6 'includ':9 'ism':53 'keep':57 'learn':36 'linux':50 'mani':20 'necessari':64 'offici':39 'option':30 'portabl':59 'provid':21 'realli':63 'rgrep':13 'run':26 'script':23,43 'shell':22 'simpli':25 'syntax':71 'tri':55 'unless':60 'unport':68 'use':66 'widespread':5 'year':15"
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          date: 2023-12-26 18:51:08.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        "@bizdelnick@lemmy.ml"
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        date: 2024-02-16 03:30:44.0 +01:00
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        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > Good for you. Do you want a cookie or something?\n
      \n
      I don’t know about that guy but you need a chill-pill dude.
      """
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      "@bizdelnick@lemmy.ml"
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      date: 2023-12-26 22:10:42.0 +01:00
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  +root: App\Entity\EntryComment {#4313}
  +body: """
    Well he wrote it like he wanted to be applauded for it or something.\n
    \n
    I also find the irony of your comment extremely funny … although that’s probably lost on you.\n
    \n
    Later, dude.
    """
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111 DENIED edit 
App\Entity\EntryComment {#5839
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +parent: App\Entity\EntryComment {#5717
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      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5618
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#5499
          +user: Proxies\__CG__\App\Entity\User {#5500 …}
          +entry: App\Entity\Entry {#2412}
          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: App\Entity\EntryComment {#4313
            +user: App\Entity\User {#4326 …}
            +entry: App\Entity\Entry {#2412}
            +magazine: App\Entity\Magazine {#266}
            +image: null
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            +root: null
            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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              "323232"
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              "@harsh3466@lemmy.world"
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            }
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              date: 2023-12-25 18:13:09.0 +01:00
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          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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            date: 2023-12-26 12:37:26.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          "@bizdelnick@lemmy.ml"
          "@SpaceCadet@feddit.nl"
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        -bodyTs: "'also':41 'backward':32 'bashism':48 'command':69 'compat':33 'correspond':29 'distribut':16 'document':40 'egrep':10 'fgrep':11 'full':46 'gnu':1 'gnuism':49 'grep':2,27 'implement':6 'includ':9 'ism':53 'keep':57 'learn':36 'linux':50 'mani':20 'necessari':64 'offici':39 'option':30 'portabl':59 'provid':21 'realli':63 'rgrep':13 'run':26 'script':23,43 'shell':22 'simpli':25 'syntax':71 'tri':55 'unless':60 'unport':68 'use':66 'widespread':5 'year':15"
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          date: 2023-12-26 18:51:08.0 +01:00
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        date: 2024-02-16 03:30:44.0 +01:00
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        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > Good for you. Do you want a cookie or something?\n
      \n
      I don’t know about that guy but you need a chill-pill dude.
      """
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      date: 2023-12-26 22:10:42.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4313}
  +body: """
    Well he wrote it like he wanted to be applauded for it or something.\n
    \n
    I also find the irony of your comment extremely funny … although that’s probably lost on you.\n
    \n
    Later, dude.
    """
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
112 DENIED moderate 
App\Entity\EntryComment {#5839
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      date: 2024-02-11 00:21:54.0 +01:00
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      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: App\Entity\EntryComment {#5784
    +user: Proxies\__CG__\App\Entity\User {#5785 …}
    +entry: App\Entity\Entry {#2412}
    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: App\Entity\EntryComment {#5717
      +user: Proxies\__CG__\App\Entity\User {#5500 …}
      +entry: App\Entity\Entry {#2412}
      +magazine: App\Entity\Magazine {#266}
      +image: null
      +parent: App\Entity\EntryComment {#5618
        +user: App\Entity\User {#4326 …}
        +entry: App\Entity\Entry {#2412}
        +magazine: App\Entity\Magazine {#266}
        +image: null
        +parent: App\Entity\EntryComment {#5499
          +user: Proxies\__CG__\App\Entity\User {#5500 …}
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          +magazine: App\Entity\Magazine {#266}
          +image: null
          +parent: App\Entity\EntryComment {#4313
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            +magazine: App\Entity\Magazine {#266}
            +image: null
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            +body: """
              It is a great book, although a bit outdated. In particular, nowadays `egrep` is not recommended to use. `grep -E` is a more portable synonim.\n
              \n
              Some notes on you script:\n
              \n
              1. You don’t need to escape slashes in grep regex. In the sed `s///` command better use another character like `s###` so you also can leave slashes unescaped.\n
              2. You usually don’t need to pipe `grep` and `sed`, `sed -n` with regex address and explicit printing command gives the same result as `grep`.\n
              3. You could omit leading slash in your `egrep` regex, so you won’t need to remove it later.\n
              \n
              So I would do the same with\n
              \n
              ```\n
              \n
              <span style="color:#323232;">tar -tzvf file.tar.gz | sed -En '/.(mp4|mkv)$/{s#^.*/##; s#.[.*##; s#[^a-zA-Z0-9()&-]# #g; s/ +/ /g; p}'\n
              </span>\n
              ```
              """
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              date: 2024-02-16 21:09:53.0 +01:00
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              "323232"
            ]
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              "@harsh3466@lemmy.world"
              "@harsh3466@lemmy.world"
            ]
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              date: 2024-02-12 12:23:47.0 +01:00
            }
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              date: 2023-12-25 18:13:09.0 +01:00
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          +root: App\Entity\EntryComment {#4313}
          +body: """
            > nowadays egrep is not recommended to use. grep -E is a more portable synonim\n
            \n
            Not directed at you personally, but this is the kind of pointless pedantry from upstream developers that grinds my gears.\n
            \n
            Like, I’ve used `egrep` for 25 years. I don’t know of a still relevant Unix variant in existence that doesn’t have the `egrep` command. But suddenly now, when any other Unix variant but Linux is all but extinct, and all your shell scripts are probably full of bashisms and Linuxisms anyway, *now* there is somehow a portability problem, and they deem it necessary to print out a warning whenever I dare to run `egrep` instead of `grep -E`? C’mon now … If anything, they have just made it *less* portable by spitting out spurious warnings where there weren’t any before.
            """
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            date: 2023-12-26 12:37:26.0 +01:00
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        +root: App\Entity\EntryComment {#4313}
        +body: """
          GNU grep, the most widespread implementation, does not include `egrep`, `fgrep` and `rgrep` for years. Distributions (not all, but many) provide shell scripts that simply run `grep` with corresponding option for backward compatibility. You can learn this from official documentation.\n
          \n
          Also, *my* scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.
          """
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          "@harsh3466@lemmy.world"
          "@bizdelnick@lemmy.ml"
          "@SpaceCadet@feddit.nl"
        ]
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      +root: App\Entity\EntryComment {#4313}
      +body: """
        > GNU grep, the most widespread implementation, does not include egrep, fgrep and rgrep for years. Distributions (not all, but many) provide shell scripts that simply run grep with corresponding option for backward compatibility. You can learn this from official documentation.\n
        \n
        It seems you need to read the official documentation yourself. While it’s new information to me that `egrep` is no longer a symlink, as it used to be a couple of years ago, but a shell script wrapper to `grep -E` instead, the egrep command is to this day still provided by upstream GNU grep and is installed by default if you run `./configure; make; make install` from source. So it is not a backward compatibility hack provided by the distribution.\n
        \n
        You can check for yourself. Download the source from [ftp.gnu.org/gnu/grep/grep-3.11.tar.gz](https://ftp.gnu.org/gnu/grep/grep-3.11.tar.gz), unpack and look for `src/egrep.sh` or line 1756 of `src/Makefile`. Apparently the change from symlink to shell script was done in 2014, and the deprecation warning was added only last year.\n
        \n
        In any case, my larger point is that the depreciation of `egrep` was a pointless and arbitrary decision that does not benefit users, especially not veterans like myself who have become accustomed to its presence. I don’t mind change, but let’s be honest, most people are not in the habit of checking the minutiae of every little command line utility they use, so a change like this violates the principle of least surprise. It’s one thing if things are changed with a good reason and the users do not only suffer the inconvenience of the change but get to reap the benefits of it as well, but so far I haven’t found any justification for it yet, nor can I think of any.\n
        \n
        So if there is a portability problem with using `egrep` now, it’s a *self-inflicted* portability problem that they caused by deprecating `egrep` in the first place.\n
        \n
        > Also, my scripts are not full of bashisms, gnuisms, linuxisms and other -isms, I try to keep them portable unless it is really necessary to use some unportable command or syntax.\n
        \n
        Good for you. Do you want a cookie or something?
        """
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        date: 2024-02-16 03:30:44.0 +01:00
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        date: 2023-12-26 19:43:55.0 +01:00
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    +root: App\Entity\EntryComment {#4313}
    +body: """
      > Good for you. Do you want a cookie or something?\n
      \n
      I don’t know about that guy but you need a chill-pill dude.
      """
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      date: 2023-12-26 22:10:42.0 +01:00
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  }
  +root: App\Entity\EntryComment {#4313}
  +body: """
    Well he wrote it like he wanted to be applauded for it or something.\n
    \n
    I also find the irony of your comment extremely funny … although that’s probably lost on you.\n
    \n
    Later, dude.
    """
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        \n
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        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
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      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
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  +body: "Just to chip in because I haven't seen it mentioned yet, but I fing LLMs like ChatGPT or Microsoft Copilot are really good at making regexes and also at *explaining* regexes. So if you're learning them or just want to get the darned thing to work so you can go to bed those are a good resource."
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        \n
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        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
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      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
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      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
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      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      This is the full sed command:\n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: "Just to chip in because I haven't seen it mentioned yet, but I fing LLMs like ChatGPT or Microsoft Copilot are really good at making regexes and also at *explaining* regexes. So if you're learning them or just want to get the darned thing to work so you can go to bed those are a good resource."
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      +body: "Just to chip in because I haven't seen it mentioned yet, but I fing LLMs like ChatGPT or Microsoft Copilot are really good at making regexes and also at *explaining* regexes. So if you're learning them or just want to get the darned thing to work so you can go to bed those are a good resource."
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    +body: "You know, I haven’t yet used ChatGPT for anything, I might check it out for this reason."
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  +body: "I use it to tell me which page of the Pathfinder 1e manual I should look on for the rules I need."
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        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      +body: "Just to chip in because I haven't seen it mentioned yet, but I fing LLMs like ChatGPT or Microsoft Copilot are really good at making regexes and also at *explaining* regexes. So if you're learning them or just want to get the darned thing to work so you can go to bed those are a good resource."
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    +body: "You know, I haven’t yet used ChatGPT for anything, I might check it out for this reason."
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  +body: "I use it to tell me which page of the Pathfinder 1e manual I should look on for the rules I need."
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        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +body: "Just adding my congrats. Good job, OP. Regex is super useful stuff."
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
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      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      - All of the periods in between words\n
      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
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      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      Edit: fixed title so it didn’t say “regex expressions”
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        From Wikipedia, the free encyclopedia\n
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        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      \n
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        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: "Just adding my congrats. Good job, OP. Regex is super useful stuff."
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  +body: "Thank you!!!"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      \n
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        \n
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        - No misinformation\n
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        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
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      \n
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      - Everything from `.[` to the end\n
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      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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  +body: "Dang! I read through my post three times to make sure I didn’t do that and completely missed that I did it right in the title. (Now fixed)."
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139 DENIED edit 
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
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        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
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      \n
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      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      \n
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      \n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +body: """
    Thanks!\n
    \n
    And it still kinda breaks my brain when I look at an expression. When I just look at it it looks like utter gibberish, but when I say to myself, “okay, what’s this doing?”\n
    \n
    And go through it character by character, it turns into something I can comprehend.
    """
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        \n
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        \n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +magazine: App\Entity\Magazine {#266}
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    +body: "Nice! Learning regular expressions is one of those things where it’s absurd but once you do it, you can solve problems that bedevil whole industries."
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    -bodyTs: "'absurd':13 'bedevil':24 'express':4 'industri':26 'learn':2 'nice':1 'one':6 'problem':22 'regular':3 'solv':21 'thing':9 'whole':25"
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  +root: App\Entity\EntryComment {#4608}
  +body: """
    Thanks!\n
    \n
    And it still kinda breaks my brain when I look at an expression. When I just look at it it looks like utter gibberish, but when I say to myself, “okay, what’s this doing?”\n
    \n
    And go through it character by character, it turns into something I can comprehend.
    """
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}
 
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +ranking: 0
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      date: 2023-12-24 23:19:41.0 +01:00
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  +root: App\Entity\EntryComment {#4608}
  +body: """
    Thanks!\n
    \n
    And it still kinda breaks my brain when I look at an expression. When I just look at it it looks like utter gibberish, but when I say to myself, “okay, what’s this doing?”\n
    \n
    And go through it character by character, it turns into something I can comprehend.
    """
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    "@ShittyBeatlesFCPres@lemmy.world"
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150 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
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      \n
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      \n
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      \n
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      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      \n
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      \n
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      \n
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      """
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
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      \n
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      - All of the periods in between words\n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
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      - All of the periods in between words\n
      \n
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      \n
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      \n
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      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        \n
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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162 DENIED moderate 
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        \n
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        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
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      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
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      \n
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      \n
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      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    I think the most impressive part of this is that your wife cares.\n
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    ...does she have a sister?
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Show voter details
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        From Wikipedia, the free encyclopedia\n
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        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        - No NSFW content\n
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        \n
        ### Related Communities\n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +magazine: App\Entity\Magazine {#266}
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  +parent: null
  +root: null
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    I think the most impressive part of this is that your wife cares.\n
    \n
    ...does she have a sister?
    """
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}
 
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 ACCESS ABSTAIN 
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 ACCESS DENIED 
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 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
165 DENIED ROLE_USER 
null
 
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 ACCESS ABSTAIN 
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 ACCESS DENIED 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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166 DENIED moderate 
App\Entity\EntryComment {#5390
  +user: Proxies\__CG__\App\Entity\User {#5391 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
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      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
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      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
    +root: null
    +body: """
      I think the most impressive part of this is that your wife cares.\n
      \n
      ...does she have a sister?
      """
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  }
  +root: App\Entity\EntryComment {#4754}
  +body: """
    I'm currently seeing a girl I started dating after she had problems with her regex and I helped her out.\n
    \n
    So far so good.
    """
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 ACCESS ABSTAIN 
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 ACCESS DENIED 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
167 DENIED edit 
App\Entity\EntryComment {#5390
  +user: Proxies\__CG__\App\Entity\User {#5391 …}
  +entry: App\Entity\Entry {#2412
    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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168 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    I'm currently seeing a girl I started dating after she had problems with her regex and I helped her out.\n
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    So far so good.
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I think the most impressive part of this is that your wife cares.\n
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      ...does she have a sister?
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171 DENIED edit 
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        From Wikipedia, the free encyclopedia\n
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        \n
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        \n
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        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      I think the most impressive part of this is that your wife cares.\n
      \n
      ...does she have a sister?
      """
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172 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        \n
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        - No misinformation\n
        - No NSFW content\n
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        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      I think the most impressive part of this is that your wife cares.\n
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      ...does she have a sister?
      """
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Show voter details
173 DENIED ROLE_USER 
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Show voter details
174 DENIED moderate 
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        \n
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        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
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        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
      Then I used sed with the expression groups to remove:\n
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      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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        \n
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        - No NSFW content\n
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        \n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +body: "> Give a man a regular expression and he’ll match a string… teach him to make his own regular expressions and you’ve got a man with problems. – yakugo in [regex.info/blog/2006-09-15/247#comment-3022](http://regex.info/blog/2006-09-15/247#comment-3022) (and yes, it is `http://` never `https://` for this domain)"
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: "> Give a man a regular expression and he’ll match a string… teach him to make his own regular expressions and you’ve got a man with problems. – yakugo in [regex.info/blog/2006-09-15/247#comment-3022](http://regex.info/blog/2006-09-15/247#comment-3022) (and yes, it is `http://` never `https://` for this domain)"
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Show voter details
179 DENIED edit 
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        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
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        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
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        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: "> Give a man a regular expression and he’ll match a string… teach him to make his own regular expressions and you’ve got a man with problems. – yakugo in [regex.info/blog/2006-09-15/247#comment-3022](http://regex.info/blog/2006-09-15/247#comment-3022) (and yes, it is `http://` never `https://` for this domain)"
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180 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        \n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
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      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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  +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
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        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
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      \n
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      \n
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      \n
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      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
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      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
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      \n
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      \n
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      \n
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      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      This is the full sed command:\n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        ### Rules\n
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        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
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        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +body: "It’s definitely a way to get your regex-fu to the next level, especially if you have people to compete against."
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
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      This is the full sed command:\n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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    +body: "That looks like a great way to practice"
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  +body: "It’s definitely a way to get your regex-fu to the next level, especially if you have people to compete against."
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
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        - No hate speech, bigotry, etc\n
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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  +root: App\Entity\EntryComment {#4902}
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
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      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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        +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      \n
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      - All of the periods in between words\n
      \n
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      \n
      This is the full sed command:\n
      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
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        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
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        ### Rules\n
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        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
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        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        From Wikipedia, the free encyclopedia\n
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        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          +body: "I highly recommend [alf.nu/RegexGolf?world=regex&amp;level=r00](https://alf.nu/RegexGolf?world=regex&level=r00)"
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        +body: "That looks like a great way to practice"
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      +root: App\Entity\EntryComment {#4902}
      +body: "It’s definitely a way to get your regex-fu to the next level, especially if you have people to compete against."
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    +root: App\Entity\EntryComment {#4902}
    +body: "Oh gosh. There are regex competitions out there, aren’t there."
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  +root: App\Entity\EntryComment {#4902}
  +body: "Yup, including for the largest “in production” regular expression…."
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
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      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      """
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
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      \n
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      \n
      Edit: fixed title so it didn’t say “regex expressions”
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  +body: "I stumbled upon this [regex crossword](https://jimbly.github.io/regex-crossword/) puzzle a while back. I was never good enough to get it, but it seems like it could be fun."
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        \n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +body: """
    I can also recommend the book the TS mentioned, it is very good and after reading it you will understand regular expressions. It’s fine to use a cheat sheet if you want, cause if you don’t do it regularly the knowledge can sag, but the understanding is what matters. Also depending on the context, different implementations can have slightly different syntax or modifiers to be aware of.\n
    \n
    I lent out the book to my brother once and he somehow lost it, so I never got it back. Don’t lend out book guys.\n
    \n
    And remember not everything can be solved using a regular expression: [xkcd.com/1171/](https://xkcd.com/1171/)
    """
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        \n
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        \n
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        \n
        ### Rules\n
        \n
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        - No NSFW content\n
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        \n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +upVotes: 0
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    +ranking: 1703542531
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    +apId: "https://lemmy.world/post/9942188"
    +editedAt: DateTimeImmutable @1707607314 {#1850
      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    I can also recommend the book the TS mentioned, it is very good and after reading it you will understand regular expressions. It’s fine to use a cheat sheet if you want, cause if you don’t do it regularly the knowledge can sag, but the understanding is what matters. Also depending on the context, different implementations can have slightly different syntax or modifiers to be aware of.\n
    \n
    I lent out the book to my brother once and he somehow lost it, so I never got it back. Don’t lend out book guys.\n
    \n
    And remember not everything can be solved using a regular expression: [xkcd.com/1171/](https://xkcd.com/1171/)
    """
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    "@harsh3466@lemmy.world"
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}
 
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  +user: App\Entity\User {#5062 …}
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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        date: 2023-11-02 13:51:08.0 +01:00
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    +image: null
    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1703542531
    +visibility: "visible             "
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    +editedAt: DateTimeImmutable @1707607314 {#1850
      date: 2024-02-11 00:21:54.0 +01:00
    }
    +createdAt: DateTimeImmutable @1703456131 {#2420
      date: 2023-12-24 23:15:31.0 +01:00
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  +magazine: App\Entity\Magazine {#266}
  +image: null
  +parent: null
  +root: null
  +body: """
    I can also recommend the book the TS mentioned, it is very good and after reading it you will understand regular expressions. It’s fine to use a cheat sheet if you want, cause if you don’t do it regularly the knowledge can sag, but the understanding is what matters. Also depending on the context, different implementations can have slightly different syntax or modifiers to be aware of.\n
    \n
    I lent out the book to my brother once and he somehow lost it, so I never got it back. Don’t lend out book guys.\n
    \n
    And remember not everything can be solved using a regular expression: [xkcd.com/1171/](https://xkcd.com/1171/)
    """
  +lang: "en"
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}
 
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Show voter details
210 DENIED moderate 
App\Entity\EntryComment {#5122
  +user: App\Entity\User {#5135 …}
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      \n
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      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
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      \n
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      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
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    That’s cool! Kudos!\n
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        From Wikipedia, the free encyclopedia\n
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        \n
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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      \n
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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  +parent: null
  +root: null
  +body: """
    That’s cool! Kudos!\n
    \n
    My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
    """
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  +entry: App\Entity\Entry {#2412
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    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +domain: Proxies\__CG__\App\Entity\Domain {#1915 …}
    +slug: "My-First-Regular-Expressions"
    +title: "My First Regular Expressions"
    +url: null
    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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    +magazine: App\Entity\Magazine {#266}
    +image: null
    +parent: null
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    +body: """
      That’s cool! Kudos!\n
      \n
      My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
      """
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  }
  +root: App\Entity\EntryComment {#5122}
  +body: """
    🤣\n
    \n
    I went though about 20 iterations to get all of this to work correctly.
    """
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Show voter details
215 DENIED edit 
App\Entity\EntryComment {#5220
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    +user: Proxies\__CG__\App\Entity\User {#1970 …}
    +magazine: App\Entity\Magazine {#266
      +icon: Proxies\__CG__\App\Entity\Image {#247 …}
      +name: "linux@lemmy.ml"
      +title: "linux"
      +description: """
        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
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        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
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      \n
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      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
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      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
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      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      That’s cool! Kudos!\n
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    🤣\n
    \n
    I went though about 20 iterations to get all of this to work correctly.
    """
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216 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
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      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
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      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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      That’s cool! Kudos!\n
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      My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
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    🤣\n
    \n
    I went though about 20 iterations to get all of this to work correctly.
    """
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        \n
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        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        That’s cool! Kudos!\n
        \n
        My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
        """
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      🤣\n
      \n
      I went though about 20 iterations to get all of this to work correctly.
      """
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  +body: "Why spend 20 minutes manually changing text in a file, when you can spend 90 minutes figuring out a single RegEx to do it?"
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        \n
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        \n
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        \n
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        - No misinformation\n
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        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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    +title: "My First Regular Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        That’s cool! Kudos!\n
        \n
        My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
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      🤣\n
      \n
      I went though about 20 iterations to get all of this to work correctly.
      """
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  +body: "Why spend 20 minutes manually changing text in a file, when you can spend 90 minutes figuring out a single RegEx to do it?"
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      +title: "linux"
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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        That’s cool! Kudos!\n
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      🤣\n
      \n
      I went though about 20 iterations to get all of this to work correctly.
      """
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  +root: App\Entity\EntryComment {#5122}
  +body: "Why spend 20 minutes manually changing text in a file, when you can spend 90 minutes figuring out a single RegEx to do it?"
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        - No misinformation\n
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        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          That’s cool! Kudos!\n
          \n
          My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
          """
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        🤣\n
        \n
        I went though about 20 iterations to get all of this to work correctly.
        """
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    +body: "Why spend 20 minutes manually changing text in a file, when you can spend 90 minutes figuring out a single RegEx to do it?"
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  +body: "So much truth here."
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        From Wikipedia, the free encyclopedia\n
        \n
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        \n
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        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
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        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
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      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
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      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
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      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
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      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          That’s cool! Kudos!\n
          \n
          My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
          """
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        🤣\n
        \n
        I went though about 20 iterations to get all of this to work correctly.
        """
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224 DENIED moderate 
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        From Wikipedia, the free encyclopedia\n
        \n
        Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
        \n
        Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
        \n
        ### Rules\n
        \n
        - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
        - No misinformation\n
        - No NSFW content\n
        - No hate speech, bigotry, etc\n
        \n
        ### Related Communities\n
        \n
        - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
        - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
        - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
        - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
        \n
        Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
        """
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    +slug: "My-First-Regular-Expressions"
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    +body: """
      I’ve been reading *Mastering Regular Expressions* by Jeffrey E.F. Friedl, and since nobody in my life (aside from my wife) cares, I thought I’d share something I’m pretty proud of. My first set of regular expressions, that I wrote myself to manipulate the text I’m working with.\n
      \n
      What’s I’m so happy about is that I wrote these expressions. I understand exactly what they do and the purpose of each character in each expression.\n
      \n
      I’ve used regex in the past. Stuff cobbled together from stack overflow, but I never really understood how they worked or what the expressions meant, just that they did what I needed them to do at the time.\n
      \n
      I’m only about 10% of the way through the book, but already I understand so much more than I ever did about regex *(I also recognize I have a lot to learn)*.\n
      \n
      I wrote the expressions to be used with egrep and sed to generate and clean up a list of filenames pulled out of tarballs. *(movies I’ve ripped from my DVD collection and tarballed to archive them)*.\n
      \n
      The first expression I wrote was this one used with tar and egrep to list the files in the tarball and get just the name of the video file:\n
      \n
      `tar -tzvf file.tar.gz | egrep -o ‘/[^/]*.m(kv|p4)’ > movielist`\n
      \n
      Which gives me a list of movies of which this is an example:\n
      \n
      `/The.Hunger.Games.(2012).[tmdbid-70160].mp4`\n
      \n
      Then I used sed with the expression groups to remove:\n
      \n
      - the leading forward slash\n
      - Everything from `.[` to the end\n
      - All of the periods in between words\n
      \n
      And the last expression checks for one or more spaces and replaces them with a single space.\n
      \n
      This is the full sed command:\n
      \n
      `sed -Eie ‘s/^///; s/.[[a-z]±[0-9]+].m(p4|kv)//; s/[^a-zA-Z0-9()&amp;-]/ /g; s/ +/ /g’ movielist`\n
      \n
      Which leaves me with a pretty list of movies that looks like this:\n
      \n
      `The Hunger Games (2012)`\n
      \n
      I’m sure this could be done more elegantly, and I’m happy for any feedback on how to do that! For now, I’m just excited that I’m beginning to understand regex and how to use it!\n
      \n
      Edit: fixed title so it didn’t say “regex expressions”
      """
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          That’s cool! Kudos!\n
          \n
          My biggest project was to remove leading and trailing whitespaces but I think I failed twice 😅
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        🤣\n
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        I went though about 20 iterations to get all of this to work correctly.
        """
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    +createdAt: DateTimeImmutable @1703458378 {#5519
      date: 2023-12-24 23:52:58.0 +01:00
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  }
  +root: App\Entity\EntryComment {#5122}
  +body: "So much truth here."
  +lang: "en"
  +isAdult: false
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  +lastActive: DateTime @1703472082 {#5644
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    "@harsh3466@lemmy.world"
    "@juli@programming.dev"
    "@NegativeLookBehind@kbin.social"
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
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"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
225 DENIED edit 
App\Entity\Magazine {#266
  +icon: Proxies\__CG__\App\Entity\Image {#247 …}
  +name: "linux@lemmy.ml"
  +title: "linux"
  +description: """
    From Wikipedia, the free encyclopedia\n
    \n
    Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).\n
    \n
    Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word “Linux” in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.\n
    \n
    ### Rules\n
    \n
    - Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.\n
    - No misinformation\n
    - No NSFW content\n
    - No hate speech, bigotry, etc\n
    \n
    ### Related Communities\n
    \n
    - [!opensource@lemmy.ml](https://lemmy.ml/c/opensource)\n
    - [!libre_culture@lemmy.ml](https://lemmy.ml/c/libre_culture)\n
    - [!technology@lemmy.ml](https://lemmy.ml/c/technology)\n
    - [!libre_hardware@lemmy.ml](https://lemmy.ml/c/libre_hardware)\n
    \n
    Community icon by [Alpár-Etele Méder](https://www.iconfinder.com/pocike), licensed under [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/)
    """
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  +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
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  +apId: "linux@lemmy.ml"
  +apProfileId: "https://lemmy.ml/c/linux"
  +apPublicUrl: "https://lemmy.ml/c/linux"
  +apFollowersUrl: "https://lemmy.ml/c/linux/followers"
  +apInboxUrl: "https://lemmy.ml/inbox"
  +apDomain: "lemmy.ml"
  +apPreferredUsername: "linux"
  +apDiscoverable: true
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    date: 2024-10-22 09:53:16.0 +02:00
  }
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    date: 2023-11-02 13:51:08.0 +01:00
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
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"App\Security\Voter\EntryVoter"
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"App\Security\Voter\MagazineVoter"
 ACCESS DENIED 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details