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Regular expression

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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.

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micromatch / micromatch

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Highly optimized wildcard and glob matching library. Faster, drop-in replacement to minimatch and multimatch. Used by square, webpack, babel core, yarn, jest, ract-native, taro, bulma, browser-sync, stylelint, nyc, ava, and many others! Follow micromatch's author: https://github.com/jonschlinkert

javascript bash node regex glob regular-expression matcher glob-pattern glob-matching multimatch minimatch wildcard micromatch extglob node-glob globbing extended-glob wildmat globby tidelift
  • Updated Aug 26, 2024
  • JavaScript

Created by Stephen Cole Kleene

Released 1950

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awk glob grep pattern-matching sed wildcard