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/archetipo95/esercizi-automi-e-linguaggi-formali

Raccolta esercizi svolti in jflap 8 beta durante il corso di Automi e Linguaggi Formali.

alf automata esercizi jflap pushdown-automaton regular-expression turing-machine

Last synced: 17 Jan 2025

https://github.com/smuecke/regextube

Firefox addon for filtering YouTube subscription feed using regular expressions

filter firefox-addon firefox-extension regex regular-expression youtube

Last synced: 17 Jan 2025

https://github.com/mikeludemann/regular-expressions-helper

Simple regular expressions for many rules on websites and more

regular-expression regular-expressions

Last synced: 02 Feb 2025

https://github.com/turbobasic/regexyouwillnotforget

Best practices for making complex regular expressions which you will understand half year later

best-practices powershell regex regular-expression

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https://github.com/pionl/match-replace-all

Finds strings by given match and replaces the content using callback function

javascript regular-expression replace-text

Last synced: 10 Jan 2025

https://github.com/thgossler/replacepdfhyperlinks

A CLI tool for Windows and Linux to search and replace hyperlinks in PDF documents with regular expressions.

cli hyperlinks pdf regular-expression replace

Last synced: 30 Jan 2025

https://github.com/amponsemmichael/library-management-system-test

This repository is created for testing the library management system designed with Java.

git gitactions-workflow integration-testing jacoco-report javafx maven-plugin maven-pom mockito-junit-test regex-match regex-pattern regular-expression unittest

Last synced: 21 Jan 2025

https://github.com/aneeshmurali-n/python-tasks

Here we are going to learn data science and python by doing tasks by task

data-science data-visualization exploratory-data-analysis filter lambda lambda-functions map-reduce matplotlib numpy oops-in-python pandas python python-fundamentals regex regular-expression

Last synced: 09 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