Regular expressions are text strings formed in a particular syntax that is used in various tools and programming languages for searching text patterns within text. The sites in this section provide help, tutorials and collections of frequently asked questions ("FAQs") about various aspects of regular expressions. Help, and Tutorials FAQs Regular Expressions Languages Programming Computers.
- One-page Regular Expressions Cheat Sheet www
One-page reference. Expressions Cheat Sheet. Presents major points of regex syntax. Regular Expressions Cheat Sheet.
- Blog Advanced Regular Expression Tips and Techniques www
Blog post. Regular Expression Tips and Techniques. Discusses techniques such as commenting, callbacks, lookarounds, conditionals and named patterns. Advanced Regular Expression Tips and Techniques.
- Python Regular Expression HowTo www
Python regex tutorial. Expression HowTo. Focuses on the re module. Regular Expression HowTo.
- Blog Flagrant Badassery www
Blog of Steven Levithan. Badassery. Discusses the Regex Cookbook by Levithan and Jan Goyvaerts, regex APIs and regex recipes. Flagrant Badassery.
- Regex PHPFreaks www
Regex board on PHP forum. PHPFreaks. Features user-contributed questions and answers. PHPFreaks.
- Introduction So What's a Regular Expression Anyway www
Introduction to regex. What's a Regular Expression Anyway. Presents syntax, code samples. So What's a Regular Expression Anyway.
- Notes Regular Expressions www
Notes from computer science class about TCL. Expressions. Presents the Chomsky hierarchy, finite automata and regular expressions. Regular Expressions.
- Notes Finite Automata and Regular Expressions www
Notes from computer science class. Automata and Regular Expressions. Compares regular expressions to finite automata. Finite Automata and Regular Expressions.
- Series Regular Expressions in Grep Command www
Series of two articles about regex in the Unix Grep command. Expressions in Grep Command. Features examples of text searches. Regular Expressions in Grep Command.
- Manual MySQL Regular Expressions www
Manual page for MySQL regex. Regular Expressions. Features operators and character classes, includes user comments. MySQL Regular Expressions.
- Unicode Unicode Regular Expressions www
Unicode Technical Standard document. Regular Expressions. Describes guidelines for extending regex engines to use Unicode. Unicode Regular Expressions.
- Technical Seeing With C www
Technical article about regular expressions. With C. Discusses types of automata, searching, parsing, validating. Seeing With C.
- Introduction Digital Amit www
Introduction to regex. Amit. Presents syntax and examples. Digital Amit.
- Articles Four Guys from Rolla www
Articles about regular expressions. Guys from Rolla. Includes articles about parsing, validating and replacing. Four Guys from Rolla.
- Article C# Regular Expressions www
Article by O'Reilly author. Regular Expressions. Presents classes, engine details and sample expressions. C# Regular Expressions.
- Wrapper PCRE Wrapper for Delphi 7 www
Wrapper classes to support PCRE in Delphi. Wrapper for Delphi 7. Includes download links. PCRE Wrapper for Delphi 7.
- Resource Posix Regular Expressions www
Resource on doctoral student's home page. Regular Expressions. Discusses Posix syntax, ambiguous expressions. Posix Regular Expressions.
- Documentation GNU Emacs www
Documentation for regex in Emacs Lisp. Emacs. Describes the functions. GNU Emacs.
- MSDN .NET Framework Regular Expressions www
MSDN documentation. Framework Regular Expressions. Features detailed examples, list of references. .NET Framework Regular Expressions.
- Tutorial Regular Expressions in Grep www
Tutorial on nixCraft blog. Expressions in Grep. Features syntax, tricks, comments. Regular Expressions in Grep.
- Regex Zvon.org www
Regex resources. Zvon.org. Features tutorial, reference and glossary. Zvon.org.
- Regex GNU Awk User's Guide www
Regex manual pages for Awk. Awk User's Guide. Discusses syntax, dynamic regexps. GNU Awk User's Guide.
- Collection StackOverflow Tagged Questions FAQ www
Collection of questions and user-submitted answers. Tagged Questions FAQ. Features ratings for each answer and comment. StackOverflow Tagged Questions FAQ.
- Review Haskell www
Review of regex libraries in the Haskell programming language. Haskell. Includes feature matrix and benchmark. Haskell.
- Regex PHP Manual www
Regex section of the PHP manual. Manual. Covers PCRE engine, pattern syntax, PHP functions, and includes user comments. PHP Manual.
- PHP Introduction to PHP Regex www
PHP regex primer. PHP Regex. Covers intermediate syntax and functions. Introduction to PHP Regex.
- Tutorials Academic Tutorials www
Tutorials on a wide range of programming languages and subjects. Tutorials. Also offers quizzes corresponding to the material in the tutorials. Academic Tutorials.
- Using Tabs versus Spaces www
Using tabs in source code: Pro and contra, versus Spaces, by Jamie Zawinski. Tabs versus Spaces.
- Online RegexOne www
Online regex course. RegexOne. Features more than ten interactive lessons, as well as practical examples. RegexOne.
- Collection The Code Project www
Collection of articles. Code Project. Features tools, general techniques and regex implementation in various languages. The Code Project.
- Alexa: Help, and Tutorials FAQs Regular Expressions
Alexa Directory Top Sites: Help, and Tutorials FAQs Regular Expressions
- DMOZ: Help, and Tutorials FAQs Regular Expressions
dmoz.org Directory: Help, and Tutorials FAQs Regular Expressions