Re: Simple string parsing help with regex

Replies are listed 'Best First'.
Re^2: Simple string parsing help with regex by cavac (Prior) on Dec 22, 2011 at 16:11 UTC
"Negative look-behind"? This is (except for the name) a rather cool feature i just now learned. I'd give you more than one "++", but i'm not allowed to... BREW /very/strong/coffee HTTP/1.1 Host: goodmorning.example.com 418 I'm a teapot	[reply]
Re^2: Simple string parsing help with regex by shadowfox (Beadle) on Dec 22, 2011 at 15:10 UTC
Now that is very cool, I can see using that a lot! Somwhow I've never ran across that ability before, despite skimming pealre countless times. Thanks very much!	[reply]
Re^2: Simple string parsing help with regex by aaron_baugher (Curate) on Dec 23, 2011 at 23:43 UTC
The various new look-ahead/behind assertions from 5.10 are very cool, but I'll admit I haven't used them enough to find them handy yet, so in a case like this, I still think, "I want to get rid of every slash that follows a character other than a less-than, so I'll capture that character and replace them both with it," leading to this: `s\|([^<])/\|$1\|g;` [download] However, I just benchmarked that compared to your look-behind method, and yours is 75% faster. Guess I need to start learning those newer assertions, and not just for when it's impossible to do something the old way! Aaron B. My Woefully Neglected Blog, where I occasionally mention Perl.	[reply] [d/l]