Programming languages - Regular expressions - Introduction

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JavaScript - Regular Expression

http://en.wikipedia.org/wiki/JavaScript_syntax#Regular_Expression JavaScript borrows most of its syntax from Java , but also inherits from Awk and Perl , with some indirect influence from Self in its object prototype system.
A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings, using a specialized syntax held in a pattern. #!

Ruby Regular Expressions

http://www.tutorialspoint.com/ruby/ruby_regular_expressions.htm
What's New New in the Third Edition are a new chapter on PHP (and upgraded PHP coverage throughout the core chapters), and a completely rewritten Java chapter to reflect changes from Java 1.4.0 to Java 1.5/1.6. Otherwise, there are only minor updates and typo fixes. http://regex.info/

Jeffrey Friedl's Mastering Regular Expressions

http://net.tutsplus.com/tutorials/php/regular-expressions-for-dummies-screencast-series/ Over the course of a handful of video tutorials, I’m going to teach you how to use regular expressions effectively in your Javascript and PHP applications. As always, I’ll assume you know absolutely zip. Editor’s note – this series has been transferred to Nettuts+ from our sister site, ThemeForest .

Regular Expressions for Dummies: Screencast Series | Nettuts+

You Don’t Know Anything About Regular Expressions: A Complete Guide | Nettuts+

http://net.tutsplus.com/tutorials/javascript-ajax/you-dont-know-anything-about-regular-expressions/ Regular expressions can be scary…really scary. Fortunately, once you memorize what each symbol represents, the fear quickly subsides. If you fit the title of this article, there’s much to learn!