RetroFed Forums

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.

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

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.

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.

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)

	Replies	Author	Score	Last Post
Why won't this work? (lazysoci.al)	0	sabreW4K3	1	Tue Jun 10, 2025 11:52 am »
Why do regexes use `$` and `^` as line anchors? (buttondown.email)	0	Mac	1	Mon Mar 25, 2024 11:16 pm »
Defining Regular Expressions (RegEx) - Computerphile (www.youtube.com)	0	recursive_recursion [they/them]	1	Thu Dec 14, 2023 1:14 am »
Regex Crossword (regexcrossword.com)	0	Mac	1	Tue Nov 21, 2023 9:14 pm »
A comprehensive guide to the dangers of Regular Expressions in JavaScript (www.sonarsource.com)	0	philnash	1	Sat Oct 7, 2023 6:58 am »
Improving the efficiency of your regular expressions (abseil.io)	0	learnbyexample	1	Wed Oct 4, 2023 3:47 pm »
Calculate the difference and intersection of any two regexes (phylactery.org)	0	Mac	1	Fri Sep 15, 2023 7:43 pm »
new mod 2	0	VonTum	1	Thu Sep 7, 2023 8:23 am »
New Mod	0	recursive_recursion [they/them]	1	Thu Sep 7, 2023 1:26 am »
Debuggex: Online visual (railroad diagrams) regex tester. JavaScript, Python, and PCRE. (www.debuggex.com)	0	learnbyexample	1	Fri Aug 25, 2023 1:21 pm »