Regular expressions
From the makers of InspIRCd.
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Regular Expressions are way beyond the scope of this wiki, but to put it simply are a way of matching text against a pattern, which is very advanced, very powerful and also very resouce hungry.
You may find more information by searching http://www.google.co.uk for "regular expression tutorial", or you can start by looking at http://www.regular-expressions.info or other examples.
