Basic Regex information

Where can I find basic information on Regex? My textbook does not explain开发者_开发问答 it very well.

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• http://www.regular-expressions.info/
• http://www.cheat-sheets.org/#RegularExpressions
• http://www.w3schools.com/jsref/jsref_obj_regexp.asp
• http://www.codinghorror.com/blog/2008/06/regular-expressions-now-you-have-two-problems.html

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perldoc perlrequick

perldoc perlre

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I wrote a tutorial some time ago. Here's the link: http://tech.bluesmoon.info/2006/04/beginning-regular-expressions.html

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A couple of books,

The AWK Programming Language - Aho, Kernighan, Weinberger Mastering Regular Expressions - Jeffrey Friedl

and a paper.

Regular Expression Matching Can Be Simple And Fast (but is slow in Java, Perl, PHP, Python, Ruby, ...)

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If you're wanting to find tools to help with regex pattern matching as well, the best one I've found is here:

http://www.gskinner.com/RegExr/desktop/

And it's completely free. It also has some examples to help you, too. Hope this helps!