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regex

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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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byn3 / holberton-system_engineering-devops

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Holberton's DevOps/ SRE curriculum. Projects and code that focus on Bash scripting, system design, automation, web infrastructure, web servers, Linux, Vagrant, and Vim. View the READMEs inside for more descriptions of each

shell bash infrastructure ssh design vagrant devops automation web system server network regex site-reliability-engineering devtools systems network-monitoring shell-script sre bash-scripting
  • Updated Mar 8, 2019
  • Shell

Created by Stephen Cole Kleene

Released 1950

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