"Regular expressions are strings formatted using a special pattern notation that allow you to describe and parse text. Many programmers (even some good ones) disregard regular expressions as line noise, and it’s a damned shame because they come in handy so often. Once you’ve gotten the hang of them, regular expressions can be used to solve countless real world problems."
http://immike.net/blog/2007/04/06/the-absolute-bare-minimum-every-programmer-should-know-about-regular-expressions/
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