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Mastering Regular Expressions
- Author Jeffrey Friedl leads you through the steps of crafting a regular expression that gets the job done.
Posix Basic Regular Expression
- 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
- Documentation of the Regular Expression syntax used in Emacs Lisp.
Regular Expression Features in Tcl 8.1
- A HowTo guide for the Regular Expression Features contained in Tcl 8.1.
Regular Expression HOWTO
- Detailed HowTo documentation about regular expressions usage in combination with the Phyton programming/scripting language.
Regular Expressions
- A brief and general introduction.
Regular Expressions - Single Unix Specification
- Specification for regular expressions -- massive document, somewhat technical.
Regular Expressions Reference
- Downloadable reference with examples, by Miloslav Nic.
Regular Expressions in ne (Nice Editor)
- A description of the regular expression support in ne (Nice Editor).
Regular expressions
- An introduction from a University course.
Regular expressions in UNIX (Spring 1995)
- Slightly inaccurate (mixes in glob patterns and calls them "shell regular expressions") but otherwise a good concise summary of plain vs extended regular expressions.
Unicode Regular Expression Guidelines
- Unicode Technical Report #18: This document describes guidelines for how to adapt regular expression engines to use Unicode.
Using Regular Expressions
- Good overview of regular expression operators, although some features described might not be available in your implementation.
awk User's Guide - Regular Expressions
- Documentation of the Regular Expression syntax used in GNU Awk.
grep - Regular Expressions
- Documentation of the Regular Expression syntax used in GNU grep.
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