Regular expression topic

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.

List Regular expression repositories

ocaml-re

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Pure OCaml regular expressions, with support for Perl and POSIX-style strings

Orchestra

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One language to be RegExp's Successor. Visually readable and rich, technically safe and extended, naturally scalable, advanced, and optimized

Regex.Persian.Language

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Collection of Regex for validating, filtering, sanitizing and finding Persian strings

regex-cheatsheet

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Cheatsheet for different regex syntaxes

ja-timex

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自然言語で書かれた時間情報表現を抽出/規格化するルールベースの解析器

regex-for-regular-folk

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🔍💪 Regular Expressions for Regular Folk — A visual, example-based introduction to RegEx [BETA]

Regex

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🔤 Swifty regular expressions

minta

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✳️  Electron app for generating regular expressions

Automa.jl

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A julia code generator for regular expressions