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Considering he listed just about everything I can remember about regexes without google, and nothing more, I believe I'm duty bound to upvote.

My only quibble: I'd promote the character classes (especially \s and maybe \S) into this list from the "expert" category. Here's part2 (or what I call: stuff I can google later, if I need it), if anyone wants to keep reading: http://immike.net/blog/2007/06/21/extreme-regex-foo-what-you...

(Off topic, but that same character you randomly dump into irc messages appeared at the beginning of this comment)

That appears to be a backspace.

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