Regular expression

A regular expression (shortened as regex or regexp), sometimes referred to as rational expression, is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for “find” or “find and replace” operations on strings, or for input validation.

Regular expression techniques are developed in theoretical computer science and formal language theory. They are used in search engines, in search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK, and in lexical analysis. Regular expressions are also supported in many programming languages.

Different syntaxes for writing regular expressions have existed since the 1980s, one being the POSIX standard and another, widely used, being the Perl syntax.

• GitHub: https://github.com/topics/regular-expression
• Wikipedia: https://en.wikipedia.org/wiki/Regular_expression
• Created by: Stephen Cole Kleene
• Released: 1950
• Related Topics: pattern-matching, wildcard, glob, grep, awk, sed,
• Aliases: regex, regexp, regular-expressions,
• Last updated: 2025-02-10 00:25:27 UTC
• JSON Representation

https://github.com/chriskonnertz/regex

Use methods to fluently create a regular expression in PHP

api expression fluent interface library oop php regex regex-string regular regular-expression

Last synced: 22 Jan 2025

https://github.com/gpalleschi/jasciistat

A java line command tool to calculate statistic on ascii files new line terminated.

ascii extract-string regular-expression statistic

Last synced: 09 Jan 2025

https://github.com/marceloboeira/grab

👋🏼 like grep, but simpler

bash grep regular-expression shell

Last synced: 07 Feb 2025

https://github.com/switchcat/range-regex

Utility package for generating a regular expression matching numeric ranges

php php74 regex regex-pattern regexp regular-expression regular-expressions switchcat-framework

Last synced: 19 Jan 2025

https://github.com/gpalleschi/csvutil

CSVutil.sh is a very simple but effective bash shell to manage csv files by command line and generate output on stdout or file.

bash bash-script csv csv-format csv-parsing csv-reader extract regular-expression shell-script tool utility

Last synced: 09 Jan 2025

https://github.com/coditheck/regex-tutorial

A regular expression or regular expression or pattern is a string of characters that describes, according to a character string that describes, according to a precise syntax, a set of possible possible strings.

regex regex-pattern regex-tutorial regexp regular-expression

Last synced: 30 Jan 2025

https://github.com/gpalleschi/reponere

Reponere is a bash utility script to replace values in ascii files, the name is latin translation of english word "replace".

bash command-line-tool lc regular-expression replace script utility

Last synced: 09 Jan 2025

https://github.com/mpolinowski/python-re

Python working with Regular Expressions

python regex-pattern regular-expression

Last synced: 28 Jan 2025

Regular expression Awesome Lists

Computer-Science-Resources 51 awesome-regex 145

Regular expression Categories

Content 55 Regex engines 38 JavaScript regex evolution 22 Testers 15 JavaScript regex libraries 15 Performance 13 Tutorials 11 Grep-like tools 6 Visualizers 6 Syntax-free regex builders 4 Miscelaneous 4 Articles 3 Books 3 Communities 2 Collections of patterns 2