In Perl’s regex flavor, and compatible flavors, you can use a special construct to create conditional if-then-else regular expressions.| www.regular-expressions.info
Learn how to use regular expressions with Ruby and the Ruby Regexp class| www.regular-expressions.info
How to Find or Validate an Email Address| www.regular-expressions.info
In a regular expression, the vertical bar or pipe symbol tells the regex engine to match any of two or more options| www.regular-expressions.info
Learn how to use PHP’s three sets of regular expression functions| www.regular-expressions.info
Delphi Regular Expressions Classes| www.regular-expressions.info
Named Capturing Groups and Backreferences| www.regular-expressions.info
In a regular expression, parentheses can be used to group regex tokens together and for creating backreferences. Backreferences allow you to reuse part of the regex match in the regex, or in the replacement text.| www.regular-expressions.info
Learn how to use the regular expression classes that are part of the Microsoft .NET (dot net) Framework, and can be readily used in any .NET programming language such as C# (C sharp) or Visual Basic.NET| www.regular-expressions.info
The Perl programming language, originally designed for text-processing only, is the main cause for the popularity that regular expressions enjoy nowadays. Mainly because Perl’s regex engine introduced many new powerful features, and because regexes are part of the Perl syntax, and not an add-on library as with most other languages.| www.regular-expressions.info
In a regular expression, parentheses can be used to group regex tokens together and for creating backreferences. Backreferences allow you to reuse part of the regex match in the regex, or in the replacement text.| www.regular-expressions.info
PCRE (Perl Compatible Regular Expressions) is an open source library written in C that allows developers to add regular expression support to their applications. The library is compatible with a great number of C compilers and operating systems.| www.regular-expressions.info
The Just Great Software regular expression engine provides a powerful blend of the most popular regular expression flavors| www.regular-expressions.info
Regex support part of the Boost C++ source library| www.regular-expressions.info
In a regular expression, the caret matches the concept “start of string”, while the dollar sign matches “end of string”| www.regular-expressions.info
If you have written regular expressions before, you know that the regex syntax can be hard to keep track of. Certainly when writing a regex pattern that uses plenty of grouping and alternation.| www.regexbuddy.com
Use regular expressions with the grep, regexp and sub functions in the base package of the R Project| www.regular-expressions.info
Test for a match, or test for failure, without actually consuming any characters.| www.regular-expressions.info