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I've been teaching regular expressions for years, and offer a free online e-mail course on the subject (http://RegexpCrashCourse.com/).

This site is a very nice summary of regexp syntax and is written well -- but it's missing two crucial pieces that help people learn: Examples and exercises. Without practice, there's no way that people can remember the syntax.




It isn't missing those. Every section links to regex101.com prefilled, ready for experimentation.


I'll revise my criticism, then: There are some examples, but not enough. And the links to an interactive regexp system is very smart and nice.




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