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: 2026-06-11 00:26:10 UTC
- JSON Representation
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/seasawher/regular-expression-derivatives-re-examined
論文を機械翻訳しただけのリポジトリ
japanese machine-translation paper regular-expression
Last synced: 05 Feb 2026
