Regex tips

RegexTip is a Twitter account that gives one tip per day for learning regular expressions. Most of the tips apply to many flavors of regular expressions: Perl, Python, .NET, etc.

Here are a few regular expression resources.

Four tips for learning regular expressions
Regular expressions in PowerShell and Perl
Regular expressions in Python and Perl
C++ TR1 regular expressions

If you’d like to learn about regular expressions in depth, the best book on regular expressions is Jeffrey Friedl’s Mastering Regular Expressions.