Google Directory - Computers > Programming > Languages > Regular Expressions

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GNU awk User's Guide - Regular Expressions - http://www.gnu.org/software/gawk/manual/html_node/Regexp.html
Documentation of the Regular Expression syntax used in GNU Awk.

Mastering Regular Expressions (Second Edition) - http://regex.info/
Book by Jeffrey Friedl. Includes table of contents, full index, an errata sheet.

NET Framework Developer Center: Regular Expression Language Elements - http://msdn.microsoft.com/en-us/library/az24scfc(vs.71).aspx
MSDN documentation on .NET regular expressions.

Posix Basic Regular Expression - http://chaos4.phy.ohiou.edu/~thomas/ref/info/rx/Top.html
A description of both basic Posix Regular Expression syntax, the programming interface and some advanced features that are provided in the implementation of POSIX.2 regular expressions in the GNU C Library.

Programming in Emacs Lisp - Regular Expression Searches - http://www.gnu.org/software/emacs/emacs-lisp-intro/html_node/Regexp-Search.html
Documentation of the Regular Expression syntax used in Emacs Lisp.

Regex on Pete Freitag's Blog - http://www.petefreitag.com/tag/regex
The basics of using regular expressions with ColdFusion's REFind, and REReplace functions.

Regular Expression HOWTO - http://www.amk.ca/python/howto/regex/regex.html
Detailed HowTo documentation about regular expressions usage in combination with the Phyton programming/scripting language.

Regular expressions - http://www.seas.upenn.edu/~cit596/notes/dave/regexp0.html
An introduction from a University course.

Regular Expressions - Single Unix Specification - http://www.opengroup.org/onlinepubs/007908799/xbd/re.html
Specification for regular expressions -- massive document, somewhat technical.

Regular Expressions in ne (Nice Editor) - http://www.emerson.emory.edu/services/editors/ne/Regular_Expressions.html
A description of the regular expression support in ne (Nice Editor).

Regular Expressions Reference - http://www.zvon.org/other/reReference/Output/
Downloadable reference with examples, by Miloslav Nic.

Regular Expressions Tutorial - http://www.regular-expressions.info/
A tutorial and reference for many popular regular expression flavors used by programming languages like Perl, PHP, Java, C# and VB.NET as well as a description of general tools like PowerGREP and EditPad.

Regular Expressions Tutorial at Zvon - http://www.zvon.org/other/PerlTutorial/Books/Book1/
A tutorial with many examples which can be downloaded for off-line use.

Regular Expressions: An Introduction - http://www.digitalamit.com/article/regular_expression.phtml
An essential guide to one of the most useful tools in the web development: regular expressions.

Seeing With C - Regular Expressions - http://www.seeingwithc.org/topic7html.html
A writeup on regular expressions connecting the math. and the CS views to regular expressions.

Unicode Regular Expression Guidelines - http://www.unicode.org/unicode/reports/tr18/
Unicode Technical Report #18: This document describes guidelines for how to adapt regular expression engines to use Unicode.

Using Regular Expressions - http://www.landings.com/_landings/pages/regex.html
Good overview of regular expression operators, although some features described might not be available in your implementation.

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