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Noun
1. regular expression; regexComputing
Wikipedia definition
2. Regular expressionIn computing, a regular expression provides a concise and flexible means to "match" (specify and recognize) strings of text, such as particular characters, words, or patterns of characters. Common abbreviations for "regular expression" include regex and regexp. The concept of regular expressions was first popularized by utilities provided by Unix distributions, in particular the editor ed and the filter grep.
Read “Regular expression” on English Wikipedia
Read “正規表現” on Japanese Wikipedia
Read “Regular expression” on DBpedia

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