RegEx

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Welcome to the RegEx community! This is a place where you can learn about and get help with regular expressions

A regular expression is a sequence of characters that specifies a match pattern in text. Theyre usually used for find, or find and replace operations on strings, or for input validation.

founded 2 years ago
MODERATORS
VonTum
recursive_recursion
listing: all - local
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Why do regexes use $ and ^ as line anchors? (buttondown.email)
submitted 9 months ago by mac to c/regex
3 comments fedilink
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Defining Regular Expressions (RegEx) - Computerphile (www.youtube.com)
submitted 1 year ago by recursive_recursion to c/regex
0 comments fedilink
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Regex Crossword (regexcrossword.com)
submitted 1 year ago by mac to c/regex
3 comments fedilink
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A comprehensive guide to the dangers of Regular Expressions in JavaScript (www.sonarsource.com)
submitted 1 year ago by philnash to c/regex
0 comments fedilink
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Improving the efficiency of your regular expressions (abseil.io)
submitted 1 year ago by learnbyexample to c/regex
0 comments fedilink
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Calculate the difference and intersection of any two regexes (phylactery.org)
submitted 1 year ago by mac to c/regex
3 comments fedilink
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new mod 2 (self.regex)
submitted 1 year ago by VonTum to c/regex
0 comments fedilink
 
 

Hi all I am also a new mod for the regex community! Let's make this place shine :)

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New Mod (self.regex)
submitted 1 year ago by recursive_recursion to c/regex
0 comments fedilink
 
 

Hello~ I'm one of the new mods for c/regex

I'll try my best to keep this community a safe place where people can find good regex101 information without having to deal with any toxic nonsense!

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Debuggex: Online visual (railroad diagrams) regex tester. JavaScript, Python, and PCRE. (www.debuggex.com)
submitted 1 year ago by learnbyexample to c/regex
0 comments fedilink
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Regular Expression Tutorial (coding-boot-camp.github.io)
submitted 1 year ago by Ategon to c/regex
1 comments fedilink
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regex101: build, test, and debug regex (regex101.com)
submitted 1 year ago by Ategon to c/regex
0 comments fedilink
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Cloudflare Deploys Really Slow Code, Takes Down Internet - Kevin Fang (www.youtube.com)
submitted 1 year ago by ruffsl to c/regex
0 comments fedilink
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Regex engine internals as a library (blog.burntsushi.net)
submitted 1 year ago by canpolat to c/regex
0 comments fedilink
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PSA: Use Chat-GPT for writing and interpreting regex patterns for your convenience. (self.regex)
submitted 1 year ago by varsock to c/regex
8 comments fedilink
 
 

With all the strengths and shortcomings of Chat-GPT, I wanted to share one consistent strength I found it has when working with regex.

  • You can ask it to generate regex patterns for known and custom things.
    • If you are skeptical it is correct (like me), you can ask it to break down the pattern and inspect why the decisions were made. If I don't understand some fields, I type up a quick test and make sure it covers all edge cases.
  • And my personal favorite, you can paste a regex and ask it to tell you what it matches to. No more writing regex and forgetting what they are for!

I don't always have the opportunity to use regex when I work and would shy away from it because it can become illegible, but now that it is so easy I find I am slapping it everywhere and I cutting down on logic when sanitizing inputs/data. The bonus is now that I'm using it more, I am becoming less reliant on having it be generated for me.