Regex101: online regexp tester and debugger

http://regex101.com

by nicmart • 13 years ago

22 10 13 years ago

regex101.com

TallboyOne• 13 years ago

http://pineapple.io/tags/regular-expressions?sort=most_favor...

jbdeboer• 13 years ago

Great work; do you have a blog post discussing the implementation?

It would be even cooler, and much faster, if all the work could be done client-side. e.g. similar to debuggex.com

nicmart• 13 years ago

Unlucky I'm not the author of the tool... :)

thoradam• 13 years ago

If you select JavaScript as the regex implementation it seems to do the work client-side.

brey• 13 years ago

as a server-side regex parser, how do you handle catastrophic backtracking?

http://www.regular-expressions.info/catastrophic.html

this seems to handle /(x+x+)+y/ and 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' gracefully - this should take exponential time (in the number of 'x's) to resolve.

edit: seems you don't ... PHP (PCRE) is fine (php handles this well?), javascript is presumably just using my own CPU, but selecting Python allows me to use arbitrary server CPU ... sorry about that ;)

edit2: HN comments tend to focus on the negative ... pathological input handling aside, I really like it.

Lindrian• 13 years ago

Hello

I'm the creator. PCRE offers a neat feature to limit backtracking, Python does not. I still havent found a decent solution to this issue.

Javascript is run in your own browser so you'll only be screwing yourself there :p

viggity• 13 years ago

shameless plug for my own free regex tool: www.regexpixie.com

cones6882• 13 years ago

Windows only?

cones6882• 13 years ago

Great tool - just wish there was an offline version I could run!

rattyc• 13 years ago

Looks just like http://rubular.com/ to me but I guess it covers some different languages

Regex101: online regexp tester and debugger

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