I wanted to match anything but a string using regex. I did some Googling and found this: ^(?:(?!test).)*
What do ?: and ?! do? Thanks.
I wanted to match anything but a string using regex. I did some Googling
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I wanted to match anything but a string using regex. I did some Googling and found this: ^(?:(?!test).)*
What do ?: and ?! do? Thanks.
(?:) is non-capturing. That means that a match occurs as usual, but the parentheses are only for grouping (in this case to attach a
*operator to the entire thing); the matched value cannot be pulled out later with $1 or \1.(?!) is a negative lookahead assertion. That means that it matches if the string in the parentheses does not exist there.
See http://docs.python.org/library/re.html for some more operators. While regex varies in different languages, they’re fairly similar.