ci" means change inside “” ca" means change around “”
the " can be replaced with any of: ({[wspbt
For changing inside or around parentheses, curky brackets, square brackets, words, sentences, paragraphs, code blocks and HTML tags respectively.
So for example if you want to replace all parameters in a function call you just do ci(
But that’s not all, the c is one of the possible operators, but not the only one.
di{ deletes the content of a block ya[ copies the content of something inside square brackets g~iw swaps the case of a word guis makes a sentence lower case gUip makes a paragraph upper case
And the most useless one: g?at replaces the content of an HTML tag with its rot13