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Regex101: online regexp tester and debugger

• TallboyOne 13y ago
  http://pineapple.io/tags/regular-expressions?sort=most_favorited http://pineapple.io/tags/regular-expressions?sort=most_favor...
• jbdeboer 13y 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 13y ago
    Unlucky I'm not the author of the tool... :)
  • thoradam 13y ago
    If you select JavaScript as the regex implementation it seems to do the work client-side.
• brey 13y ago
  as a server-side regex parser, how do you handle catastrophic backtracking? http://www.regular-expressions.info/catastrophic.html 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 13y 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 13y ago
  shameless plug for my own free regex tool: www.regexpixie.com
  • cones688 13y ago
    Windows only?
• cones688 13y ago
  Great tool - just wish there was an offline version I could run!
• rattyc 13y ago
  Looks just like http://rubular.com/ http://rubular.com/ to me but I guess it covers some different languages