Today I want to post a list of regex resources that have been useful for me. In the first time I haven’t read a regex book, I found all my knowledge on-line, and there is plenty of regex information out there.
- regular-expressions.info, a great online resource on every aspect of regular expressions and for the differences of the languages.
- stackoverflow regex faq, the collection of questions that got faq status
As example, because those languages provide good documentation and because I know them best, here the regex docs for Perl and C#. Especially the Perl tutorials can be recommended also to regex learners of other languages, just ignore the, by your language not supported, advanced parts.
- perlrequick, Perl regular expressions quick start, a tutorial that gives a basic regex understanding.
- perlretut, Perl regular expressions tutorial. A really extensive tutorial going into all details of Perl regexes.
- perlre, the Perl regex module documentation.
- .NET Framework Regular Expressions, the introduction to .NET regular expressions.
- Details of Regular Expression Behavior, an advanced reading, not only for .NET users. Explains the details of the matching behaviour and the capabilities of the .NET Framework regex Engine.
- Regular Expression Language – Quick Reference
Online Regex Tester
- Regexr, my favourite one. Based on Flex, supports lookahead and fixed length lookbehind. Has also a regex community library and explain regex constructs. It is also possible to create permanent links to solutions.
- Rubular, based on Ruby, allows also to create permanent links.
- Regular Expression Analyzer, give it a regex and it will analyze it