Regular expressions practice/learning resources [closed]

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Can any of you recommend an online series of regular expression problems, preferably with solutions? Maybe some cs class problem set or something of that ilk?

Without using them frequently, I tend to forget everything but the very, very basics, so I'd like to be able to do some problems to really internalize the info.

Thanks!

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If you use IRC, you can try the regex quiz in #regex on Undernet.

It has a bunch of problems and suggested reading for solving them.

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Try this: http://www.regexbuddy.com/

And this: http://regexlib.com/