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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.

https://github.com/shinnn/exif-date-regex

A regular expression to validate and parse Exif date format

date ecmascript exif javascript lookbehind-assertion named-capture regular-expression validation

Last synced: 01 Aug 2025

https://github.com/jens-duttke/tslint-filter

Suppress and extend TSLint warnings, before they get returned to the console or your code editor

errors exception extend-rules failures filter ignore modify predefined-rule-wrappers regular-expression rules tslint tslint-filter tslint-rules typescript warnings

Last synced: 08 Apr 2025

https://github.com/basemax/email-validator-nodejs

This is a simple email validator for NodeJS that can match all emails in a string, check if a string has an email address, or check if a string includes a specific email address. You can use this module to validate emails in your NodeJS projects.

email email-validate email-validator javascript javascript-regex js js-regex regex regex-javascript regex-js regular-expression regular-expression-javascript regular-expression-js regular-expressions validator

Last synced: 27 Jul 2025

https://github.com/schwusch/ret.dart

Tokenizes a string that represents a regular expression.

dart regex regexp regular-expression

Last synced: 26 May 2026

https://github.com/jassielof/regex-zig

Regular expression library for Zig built on PCRE2 and Google’s RE2.

bindings library pcre2 re2 regex regular-expression regular-expressions zig

Last synced: 11 Mar 2026

https://github.com/hugoalh/url-regexp-es

An ES (JavaScript & TypeScript) module for URL regular expression.

es javascript js modulejs regexp regular-expression ts typescript url

Last synced: 22 Mar 2025

https://github.com/zeqiang-lai/visualization-of-regx2dfa

Java program that converts regular expression to DFA.

dfa java nfa regular-expression visualization-tools

Last synced: 22 Mar 2025

https://github.com/anandhunv/-email_validation_regular_expression_js

JavaScript email validation using regex for accurate input verification, ensuring valid email formats. HTML form integrated with dynamic JS validation for robust user interaction.

basic basic-javascript css html html-css-javascript javascript regular-expression

Last synced: 17 Mar 2025

https://github.com/mathiaskandelborg/regular-expressions

General purpose regular expressions for JavaScript

practice regexp regexp-validation regular-expression typescript

Last synced: 02 Apr 2025

https://github.com/sleepytariq/regex-filter

Replace matched strings in file names or file content with specified substitute using regular expressions

python3 regular-expression

Last synced: 05 Oct 2025

https://github.com/superb-man/automaton-solver

regex -> abstract syntax tree -> nfa -> dfa(minimized) conversion.

cyk-algorithm dfa dfa-minimization dotfiles json moore-minimization nfa parser regular-expression x-33

Last synced: 06 Oct 2025

https://github.com/redkenrok/node-planckmatch

Small and simple matching library using glob patterns.

glob-pattern match matching regular-expression

Last synced: 05 Apr 2025

https://github.com/auvred/regonaut

ES2025-compatible ECMAScript RegExp engine implemented in Go

ecmascript go javascript js regex regex-engine regexp regular-expression regular-expression-engine

Last synced: 14 Apr 2026

https://github.com/jaid/test-string

Checks if a string matches given string, RegExp or function.

library match regex regexp regular-expression string strings test util utility validate validation

Last synced: 31 Oct 2025

https://github.com/raghul-m/data-analysis-with-jupyternotebook-python

This repository consists of notebooks where I learned the basics of getting started with data analysis using Python libraries

beautifulsoup4 data-analysis-python eda jupyter-notebook matplotlib-python numpy pandas-python regular-expression seaborn-python webscraping

Last synced: 19 May 2026

https://github.com/yxnan/syntax-for-sublime-text

Syntax highlighting for some languages that are not officially supported by Sublime Text

highlighting regular-expression sublime-text syntax

Last synced: 21 Jan 2026

https://github.com/dzenis-h/js_practice

This repo contains various Vanilla JS applications made with only the sole purpose of sharpening my existing skills, practicing and implementing them, and, of course, learning new ones. If you take a closer look, it's obvious that I've extended this repo to include other (not vanilla JS) technologies, but still based on JavaScript.

ecmascript2017 es6 expressjs javascript nodejs reactjs redux regular-expression vanilla-javascript

Last synced: 11 Apr 2026

https://github.com/ralphtheninja/match-sink

Pipe data to a stream and react to single or multiple matches

regular-expression stream

Last synced: 14 Oct 2025

https://github.com/ascentis/mssql-regex

Simple package allowing to use CLR RegEx within MSSQL

clr-regex dotnet mssql mssql-database mssql-regex regex regular-expression

Last synced: 30 Oct 2025

https://github.com/dohliam/elements-of-a-in-b

Find matching strings in two columns using regular expressions

columns javascript matches regex regular-expression tiny-tools

Last synced: 21 Mar 2025

https://github.com/jhonatanit/parameters-medical-records

Transform unstructured, potentially faulty OCR output into a structured Python list of dictionaries.

ocr python regular-expression

Last synced: 27 Mar 2025

https://github.com/csoren66/medical-data-extraction

Medical data extraction from medical documents like prescription and patient details document using python and Regex

fastapi ocr-recognition opencv-python pdf2image pytesseract python regular-expression

Last synced: 30 Dec 2025

https://github.com/jnylen/string-matcher

An Elixir Library to run several regular expressions on a string and get values back.

elixir elixir-lang elixir-library regex regular-expression string-matching string-parsing

Last synced: 27 Jan 2026

https://github.com/mafda/regex_101

A regular expression is a sequence of characters that define a search pattern.

python3 regex regular-expression

Last synced: 11 Sep 2025

https://github.com/systemjargon/regex

Regular Expression aka regex. Some examples like, match, find, replace. Mix of usage, bash, powershell, notepad++

regex regexp regular-expression

Last synced: 26 Oct 2025

https://github.com/jaynetics/regexp_property_values

Inspect property values supported by Ruby's regex engine

onigmo oniguruma regular-expression ruby unicode

Last synced: 18 Jul 2025

https://github.com/ilyachvanov/change-style-of-naming

This program changes style of naming variables, functions and classes

gui qt regular-expression

Last synced: 31 Jan 2026

https://github.com/vaeth/mv_perl

mv_perl - A collection of perl scripts (replacement in files, syncing dirs etc)

compare perl-script recursive regular-expression rename renaming-files replace replace-in-files replace-text timestamp touch

Last synced: 25 Feb 2026

https://github.com/rangoo94/universal-lexer

Parse any text input to tokens, according to provided regular expressions.

lexer lexical-analysis parser parsing regular-expression scanner tokenizer

Last synced: 09 Sep 2025

https://github.com/coolcat467/idlealign

Idle Align - Emacs Align by Regular Expression as an IDLE Extension

align coolcat467 extension idle python python-idle python3 regex regular-expression regular-expressions tkinter-python

Last synced: 11 Apr 2025

https://github.com/shinnn/outdated-pod-regex

Create a regex that matches the Pod list generated with `pod outdated`

cocoapods javascript npm-package regular-expression xcode

Last synced: 15 Apr 2026

https://github.com/schonfinkel/RegexPlay

Readings from "A Play on Regular Expressions", 2010

haskell regular-expression

Last synced: 10 Apr 2025

https://github.com/thehashton/regex

regular expressions example for article

form-validation javascript regex regular-expression

Last synced: 19 Jun 2026

https://github.com/tqma113/regular_grammar

A recognizer for strict Regular grammar.

recognizer regular regular-expression regular-expressions

Last synced: 28 Mar 2025

https://github.com/hazimavdal/regex

A library for parsing and operating on formal regular expressions

brzozowski-derivative formal-languages parsing regular-expression regular-expressions smlnj

Last synced: 28 Feb 2026

https://github.com/odeassis/regex

Destinado ao aprendizado de expressões regulares e sendo um tipo de "documentação" para iniciantes, e um guia de referência para os já iniciados.

regex regular-expression

Last synced: 20 Mar 2025

https://github.com/exuanbo/reglax

☕ Relax and write some Regex

regex regular-expression

Last synced: 11 Apr 2025

https://github.com/erikplachta/cs-regex-reference-guide

A general reference guide on how to understand and use regex.

computer-science cs guide reference regex regular-expression regular-expressions

Last synced: 04 Mar 2026

https://github.com/buzzardgta/close_tabs_by_title

Firefox web extension that closes tabs whose titles match a specific regular expression.

close expression expressions extension firefox regex regular regular-expression regular-expressions tabs title

Last synced: 03 Apr 2025

https://github.com/jmeaster30/vore

VerbOse Regular Expressions - Regular Expression Engine with Verbose English-like Syntax

programming-language regex regular-expression

Last synced: 05 Apr 2026

https://github.com/sukanyadutta52/sentiment-analysis

An Analysis of How Machine Perceives Women and How Women Feel about Themselves As a Result of This Perception: Sentiment Analysis

flair matplotlib nltk-library pandas regular-expression sentiment-analysis spacy textblob vader-sentiment-analysis women-beauty-standard

Last synced: 20 Apr 2026

https://github.com/robertpi/indieregex

A port of .NET 7.0 regex to other .NET versions.

dotnet regex regular-expression

Last synced: 20 Apr 2026

https://github.com/miroslav-reiter/kurz_ako_sa_stat_db_analytikom

📈 Ako sa stať Databázovým ANALYTIKom - Materiály, zdroje, skripty k večernému online školeniu Ako sa stať Databázovým Analytikom pre Robime.it (Mentor Partners)

analytics analytik db dbms mysql regex regex-pattern regular-expression regular-expressions reiter sql

Last synced: 24 Apr 2026

https://github.com/kstenschke/grepc

Grep Chart: List strings that match a pattern in file(s), with and sorted by the amount of occurrences.

cli cli-tool find find-in-files gplv3 grep linux regex regular-expression

Last synced: 27 Apr 2026

https://github.com/themysterysolver/java_basics

This repository contains basic Java concepts with reference to "Head First Java" and weekly lab questions.It covers collections and javafx basics too!

awt basic-java collections docs gui head-first-java java java-learning javafx jdbc-mysql lab-exercise regular-expression servlets-jsp-html-css swing

Last synced: 28 Apr 2026

https://github.com/dreitier/conditional-regex-search-and-replace-action

Executes conditional search and replace operations on a set of files. Strings are replaced by matching regular expressions.

argocd continuous-delivery continuous-deployment continuous-integration github-action github-actions gitops glob regex regular-expression search-and-replace structure

Last synced: 29 Apr 2026

https://github.com/acaciaman/acacia-regex

Many regular expressions python search engine

bus cloud engine oci oracle osb regex regular-expression service terraform

Last synced: 29 Apr 2026

https://github.com/hex7c0/grunt-safer-regex

detect possibly exponential-time regular expressions

grunt-plugins nodejs regex regular-expression

Last synced: 01 May 2026

https://github.com/crispengari/regex-validator

this is a javascript package that validate the validity of common strings. It check if the basic strings like email, password, username are valid.

javascript regular-expression typescript validations validator

Last synced: 02 May 2026

https://github.com/sudha247/silly-markdown-parser

A markdown parser written entirely using regular expressions.

markdown parser python python3 regular-expression

Last synced: 02 May 2026

https://github.com/js-devtools/file-path-filter

Filters file paths using globs, regular expressions, or custom criteria

file-path filepath filesystem filter glob globstar javascript nodejs regular-expression

Last synced: 10 Jun 2025

https://github.com/bluelovers/regexp-support

check RegExp ( regular expressions ) support

nodejs regex regexp regular-expression

Last synced: 13 May 2026

https://github.com/carjizo/telegram-bot-gpt2

Telegram bot with gtp2

gpt-2 python regular-expression

Last synced: 17 Mar 2025

https://github.com/caioambro/desafiostringunica

Projeto do Desafio da String Única utilizando RegEx

desafio desafio-python expressao-regular python regex regular-expression

Last synced: 18 Apr 2026

https://github.com/brenofariasdasilva/regular-expressions

My Most Commonly used Regular Expressions.

regex regular-expression

Last synced: 03 Jan 2026

https://github.com/samarthhchinivar/python-basics

Python Basics learnt/excercised during RedTron Internship.

methods os python3 regular-expression

Last synced: 20 Jun 2026

https://github.com/gruhn/regex-utils

TypeScript library for regex intersection, complement and other utilities that go beyond string matching.

javascript regex regexp regular-expression regular-expressions typescript

Last synced: 19 Apr 2026

https://github.com/andrewjbateman/angular-regex-project

:clipboard: This app highlights search text within a string. It renders HTML on the screen via a variable and manipulates that HTML based on a query, a regular expression and regex replace logic.

angular angular13 css highlight-text html html5 regex regex-match regular-expression tutorial-code typescript4

Last synced: 21 Apr 2026

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: 04 Jun 2026

https://github.com/benhunter/chkpwd

Check password complexity against rules.

argparse python python3 regular-expression terminal-based utility

Last synced: 02 Apr 2025

https://github.com/ahmedelwerdany/deregex

Delete Lines from a file with regex

filesystem regex regexp regular-expression

Last synced: 11 Jun 2026

https://github.com/xspin/regexparser

Regular Expression Parser and Visualizer

lexer regular-expression visualization

Last synced: 13 Jan 2026

https://github.com/kkirby/regexp-escape

A super simple, zero dependency library to escape regular expressions.

nodejs regular-expression

Last synced: 12 Jan 2026

https://github.com/lightningstalker/makolr

Colorizes compiler output from make to increase visibility of compiler warnings and other messages among large amounts of text

ansi-colors avr-gcc cc colors commandline gcc gplus linux linux-shell mac-osx macosx make pearl regex regular-expression shell-script terminal terminal-based unix-like unix-shell

Last synced: 11 Apr 2026

https://github.com/juan-medina/regexp-dsl

expressive regular expressions with a domain specific language written in Kotlin

domain-specific-language dsl kotlin regex regex-pattern regexes regexp regexpr regular-expression regular-expressions

Last synced: 11 Jun 2026

https://github.com/gakurualex/seasons

CS50's Introduction to Programming with Python Problem Set 8. Calculate how old a person is in minutes.

cs50problemsets datetime inflect pytest python regular-expression timedelta

Last synced: 20 Apr 2026

https://github.com/harishkataria/patterns

Simplifying pattern building in Swift

pattern-matching regular-expression search swift

Last synced: 11 Oct 2025

https://github.com/davidje13/revexp

Given a regular expression, solves for possible matching input strings

regular-expression

Last synced: 17 May 2026

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: 18 May 2026

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

Python working with Regular Expressions

python regex-pattern regular-expression

Last synced: 17 Jun 2025

https://github.com/risicle/cpytraceafl-regex

A modified version of mrab-regex with added cpytraceafl instrumentation

afl-fuzz coverage cpython python regular-expression tracing

Last synced: 15 May 2026

https://github.com/mohammadyounes/match-guard

Simplify pattern matching by guarding parts of the input string

regex regex-util regular-expression

Last synced: 18 May 2026

https://github.com/edwinm/typed-re

Template literal types for regular expression capturing groups

capturing-groups regular-expression template-literal-types

Last synced: 22 Jan 2026

https://github.com/joiceo/manipulacao-de-textos-usando-o-r

Exercícios do curso "Introdução à Manipulação de Textos Usando o R", da UFJF, feito entre 24/05 e 02/06/2021

r regex regular-expression

Last synced: 12 Jun 2026

https://github.com/stuarthicks/rextract

Simple shell regex capture extractor

cli go golang regex regular-expression regular-expressions

Last synced: 15 Jun 2026

https://github.com/raghavendranhp/cardify_extracting_business_card_data_and_management

Cardify is a Streamlit application that simplifies the process of extracting and managing business card data. With Cardify, users can easily upload business card images, extract relevant information using OCR, and manage the extracted data efficiently.

easyocr ocr ocr-text-reader opencv python regular-expression sqlite3 streamlit

Last synced: 08 May 2026

https://github.com/rfdzan/electron-regx

A simple desktop app to do regular expressions with

electronjs javascript regular-expression

Last synced: 05 May 2026

https://github.com/boywithkeyboard-archive/js-imports

The most complete regular expressions for matching, parsing and validating JavaScript/TypeScript imports.

exports imports javascript regex regular-expression regular-expressions typescript

Last synced: 24 Apr 2026

https://github.com/jsumners/go-reggie

A wrapper on top of regexp.Regexp that provides utility methods for accessing named capture group results.

go golang regex regular-expression

Last synced: 30 Oct 2025

Regular expression Awesome Lists
Computer-Science-Resources 51 awesome-regex 153
Regular expression Categories
Content 63 Regex engines 44 JavaScript regex evolution 24 JavaScript regex libraries 22 Testers 21 Performance 15 Tutorials 11 Grep-like tools 7 Visualizers 6 About 5 Syntax-free regex builders 4 Articles 3 Books 3 Miscellaneous 3 Communities 2 Collections of patterns 2 Miscelaneous 1