Regular Expression @RegexTip
Learn to use regular expressions by following RegexTip. From @JohnDCook. JohnDCook.com Joined November 2009-
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Languages have minor variations in their regex support. @RegexTip mostly sticks to the common features of Perl, C#, Python, JavaScript, ...
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Create a diagram of a regular expression regexper.com
Unicode Regular Expressions Standard: unicode.org/reports/tr18/
'Everybody stand back. I know regular expressions.' xkcd.com/208/
Why Gnu grep is fast lists.freebsd.org/pipermail/free…
Regular expressions in Haskell wiki.haskell.org/Regular_expres…
Comparing regular expressions in Perl, Python, and Emacs johndcook.com/blog/regex-per…
Properties such as \p{Alphabetic} can be easier to read than [A-Za-z]. Works better with internationalization as well.
Perl Unicode properties: perldoc.perl.org/perluniprops.h…
Adding a + after a quantifier tells it to not give anything back when the regex engine backtracks.
Regular expression to match text that *doesn't* contain a word stackoverflow.com/questions/4062…
\p{Math} matches mathematical symbols (in regex implementations that support Unicode properties)
An escaped upper case letter typically means the opposite of its lower case counterpart: \D <-> \d, \S <-> \s, etc.
'Mixing Unicode and regular expressions is often a good way to make your head explode.' amzn.to/1KhAnSj
Mnemonic for look-behind syntax johndcook.com/blog/2014/05/0…
Regular expression resources regular-expressions.info
Is there a regular expression to detect a valid regular expression? stackoverflow.com/questions/1723…
The true power of regular expressions nikic.github.io/2012/06/15/The…
The regex /(Sam|Samwise)/ will never match Samwise because Sam will match first. Use /(Samwise|Sam)/ instead.
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