On Jul 7, David Storrs said: >> What the \K does is make the regex think it JUST started matching, so >> instead of replacing a bunch of stuff plus some extra fluff with the >> original bunch of stuff, we just say "after you've matched X, pretend you >> started matching HERE." It comes in handy in substitutions that look like >> >> s/(A)B/$1/; > >Honest question: What's the advantage of doing it with the \K anchor >as opposed to simply not matching the C<B> section at all? (Assuming, >of course, that you don't B<need> to match it, e.g. to disambiguate >your match.)
Uh, you have to match the "B". The point of the substitution is "remove all B's that have A before them". If A isn't constant-width, then you can't use a look-behind. It's silly to replace "AB" with "A", since that requires "work". It's easier to say "match A, then pretend you just started matching, and replace B with nothing". -- Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/ RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/ <stu> what does y/// stand for? <tenderpuss> why, yansliterate of course. [ I'm looking for programming work. If you like my work, let me know. ] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
