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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/exuanbo/reglax

☕ Relax and write some Regex

regex regular-expression

Last synced: 11 Apr 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/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/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/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/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/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/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/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/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/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/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/mathiaskandelborg/regular-expressions

General purpose regular expressions for JavaScript

practice regexp regexp-validation regular-expression typescript

Last synced: 02 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/schonfinkel/RegexPlay

Readings from "A Play on Regular Expressions", 2010

haskell regular-expression

Last synced: 10 Apr 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/teneplaysofficial/registration-and-login-system-cpp

A C++ project that provides user registration with email and password, featuring email validation using regular expressions, password length validation, and secure password management with options for resetting passwords. Future plans include implementing a cipher algorithm for enhanced data protection.

cipher-algorithm cpp emailvalidation fstream login-system regular-expression string xor-cipher

Last synced: 23 Feb 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/bpdesilva/student-registration-system

Procedural Programming concepts with C++ first project of the first year.

c-plus-plus cpp procedural-programming regex regular-expression visualcplusplus visualcpp

Last synced: 24 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/carlosstack/cleaning-data-in-r

:pick: :gem: Taking raw data and converting it to tidy data that can be used for later analysis

data-cleaning data-manipulation r-programming regular-expression

Last synced: 30 Jul 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/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/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/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/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/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/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/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/ajhsu/regextract

Extracting text with Regular Expression

javascript regexp regular-expression

Last synced: 17 Aug 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/ahsankhan26/whatsapp-chat-parser

Takes a txt file of Whatsapp Group Chat and Parses it for analysis.

python regex regular-expression regular-expressions sql whatsapp-chat-parser

Last synced: 08 Apr 2025

https://github.com/ohorbatiuk/renamer

Use regular expressions for renaming files and folders on Synology servers.

docker docker-compose docker-image filter regular-expression rename-files synology synology-servers

Last synced: 13 Apr 2026

https://github.com/gyumeijie/regexp

A quick regular expression cheatsheet by examples.

cheatsheet regular-expression

Last synced: 13 Feb 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/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/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/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/schwusch/ret.dart

Tokenizes a string that represents a regular expression.

dart regex regexp regular-expression

Last synced: 26 May 2026

https://github.com/massigy/ll1p.go

This is a simple LL(1) grammar tokenizer & parser written in Go.

go-programming-language golang grammar-parser language-theory ll1-grammar ll1-parser parser regular-expression tokenizer

Last synced: 10 Aug 2025

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/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/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/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/rijalghodi/phone-number-validator

Javascript code to solve US phone number validator This code will return true if the passed string looks like US phone number and return flase if doesn't

javascript logic-programming regular-expression

Last synced: 22 May 2026

https://github.com/ziyi2/rugular

rugular学习笔记

reg regexp regular-expression

Last synced: 05 Jan 2026

https://github.com/University-Experience/Regex-AWK

Distributed Operation Systems Lab2

awk docker linux regex regular-expression ubuntu

Last synced: 17 Jul 2025

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/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/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/stuarthicks/rextract

Simple shell regex capture extractor

cli go golang regex regular-expression regular-expressions

Last synced: 15 Jun 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/bluelovers/regexp-support

check RegExp ( regular expressions ) support

nodejs regex regexp regular-expression

Last synced: 13 May 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

https://github.com/lexhouk/goit-algo-hw-03

Модуль 3. Робота з датою, часом та розширена робота з рядками

goit goit-algo-hw-03 python-datetime python-random python-regex regex regular-expression regular-expressions studying

Last synced: 11 May 2025

https://github.com/muhammadawaisshaikh/remove-spaces-regexr

remove spaces using Regular Expression

regex regular-expression typescript

Last synced: 18 May 2026

https://github.com/inc0g-repoz/profanityfilter

An easy to use profanities filter that uses regular expressions to indicate swearings in text messages.

java java-8 java8 regex regex-match regex-pattern regexes regexp regular-expression regular-expressions

Last synced: 03 Jan 2026

https://github.com/dizys/nyu-nlp-homework-2

Develop regular expressions

nlp nyu regular-expression

Last synced: 16 Sep 2025

https://github.com/jet-logic/renx

command-line utility for batch renaming files and directories with advanced pattern matching and transformation capabilities

command-line-tool filesystem python regex regular-expression rename-files unicode-characters

Last synced: 09 Apr 2026

https://github.com/zhangshyue/webscrapper-for-imdb-and-data-visualization

A scrapy webscrapper that can scrape information about the IMDb top box office films and use pandas and matplotlib to visualize the data

json matplotlib mongodb pandas python3 regular-expression scrapy webscrapper

Last synced: 05 Apr 2026

https://github.com/university-experience/regex-awk

Distributed Operation Systems Lab2

awk docker linux regex regular-expression ubuntu

Last synced: 19 May 2026

https://github.com/lfmramos/tool-coh-piah

The COH-PIAH Detector is a Python program that analyses linguistic patterns to identify similarities between texts.

python regular-expression

Last synced: 26 Jul 2025

https://github.com/adam-marianowski/regex-form-example

Simple form built in JavaScript and HTML with Bootstrap using regular expressions for input validation

form-validation javascript regular-expression

Last synced: 27 Jul 2025

https://github.com/gehad-ahmed30/tweets_sentiment_analysis_lstm

Twitter Sentiment Analysis web app using a Bidirectional LSTM model. Predicts whether tweets are Positive, Negative, Neutral, or Irrelevant.

ai bidirectional-lstm deep-learning lstm nlp regular-expression tokenization tweets-sentiments

Last synced: 19 Sep 2025

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: 23 Sep 2025

https://github.com/jelhamm/regression-algorithms

"This repository serves as a comprehensive resource for understanding and applying Regression techniques in achine learning and statistical modeling."

achine-learning builder-pattern decision-tree decision-tree-classifier design-pattern factory-pattern linear-regression python random-forest random-forest-classifier regression regression-models regular-expression statistical-models

Last synced: 31 Jul 2025

https://github.com/rabestro/jetbrains-academy-smart-calculator

Calculators are a very helpful tool that we all use on a regular basis. Why not create one yourself, and make it really special? In this project, you will write a calculator that not only adds, subtracts, and multiplies, but is also smart enough to remember your previous calculations.

arraydeque calculator calculator-application enum hashmap interface-java jetbrains-academy lambda-expressions lambda-functions list mathematics polish-notation postfix-notation regular-expression stack stream student-project

Last synced: 08 Nov 2025

https://github.com/radiopizza/tpu-labs-android-development

This repository serves as a collection of laboratory assignments completed during the "Android Software Development" elective course

android android-studio constraintlayout coroutines dialogs fragments-layout gridlayout intents kotlin listener livedata navigation oop recyclerview regular-expression resources seekbar unit-testing viewmodel xml

Last synced: 17 May 2026

https://github.com/tiaanduplessis/codebar-regex

Regular expression for matching codebar barcode

barcode codebar regex regular-expression

Last synced: 08 Aug 2025

https://github.com/sukanyadutta52/topic_modeling

What are the most pressing concerns regarding ‘Climate Change’ among tweeters according to Topic Modeling?

climate-change gensim matplotlib nltk numpy pandas pyldavis regular-expression spacy

Last synced: 09 Apr 2026

https://github.com/loglux-lab/ip-extractor

ip-extractor.sh uses nano to extract IP addresses. Results are stored in 'hosts', with duplicates removed. Ideal for sifting through logs and data-rich files.

bash extract-data linux-shell nano regex regular-expression

Last synced: 20 Jun 2026

https://github.com/spaceshaman/deckard

Extract structured data from unstructured text — no AI, just regular expressions. 🔍

data-extraction extract extract-data regex regular-expression

Last synced: 22 Aug 2025

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: 24 Aug 2025

https://github.com/ponlawat-w/thai-spelling-fix

การตรวจจับและแก้ไขการพิมพ์ที่ไม่เป็นไปตามหลัก (เช่น สระเอสองตัวแทนที่ควรจะเป็นสระแอ การันต์มาก่อนสระอุ เป็นต้น) โดยใช้นิพจน์ปรกติ (regular expression) | Detection and correction of Thai text common misspelling using regular expression

regular-expression spelling-correction thai thai-language

Last synced: 26 Aug 2025

https://github.com/zeeshan2k2/daraz-web-scraper

A Python script to filter out the most rated products and display it alongside it's name, price and review count.

beautifulsoup4 pandas python regular-expression selenium selenium-webdriver

Last synced: 07 May 2026

https://github.com/0necontroller/regular-expressions

This repo contains some regex learning material.

javascript regex regexp regular-expression

Last synced: 28 Aug 2025

https://github.com/bdusell/jitsu-regex

A better API for PHP's regular expression functions

helper-functions php regex regular-expression

Last synced: 30 Aug 2025

https://github.com/roneetkumar/renamer

Build a tool used to rename files with a common pattern.

go golang regular-expression rename-files tool

Last synced: 15 Jun 2026

https://github.com/samliebl/regex-map-replace

Run a text string through an array of individual match-replace regular expressions.

map match regex regexp regular-expression replace replace-text string-formatter

Last synced: 14 Mar 2025

https://github.com/nicktheodoro/area-code

Validate and categorize phone numbers by area code. Given valid area codes and a list of numbers, output the count of valid numbers per area code, adhering to specified validation rules.

go golang regular-expression unit-testing validation

Last synced: 15 Jul 2025

https://github.com/faraazarsath/user-registration-login

This Python script provides a simple user registration system with username and password validation using regular expressions. It also includes a password recovery option.

filehandling if-else python regular-expression

Last synced: 29 Apr 2026

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