regular expressionn.

Brit.

/ˌrɛɡjᵿlər ᵻkˈsprɛʃn/,

/ˌrɛɡjᵿlər ɛkˈsprɛʃn/, U.S.

/ˌrɛɡ(jə)lər ɪkˈsprɛʃ(ə)n/,

/ˌrɛɡ(jə)lər ɛkˈsprɛʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: regular adj., expression n.

Etymology: < regular adj. + expression n.The current meaning may derive from the following, where the meaning is somewhat different:1956 S. C. Kleene in C. E. Shannon & J. McCarthy Automata Stud. 26 By a regular expression, we shall mean a particular way of expressing a regular set of [truth] tables starting with sets of tables for definite events and applying zero or more times the three operations.

Computing.

A series of characters and symbols that express both a string or strings to be searched for within textual data and conditions or restrictions of the search, in a way that is compatible with automated searching.

ΚΠ

1971 K. L. Thompson U.S. Patent 3,568,156 2/1 A regular expression..is a concatenation of characters and operators representing symbolically all of the possible character strings which produce successful matches.

1981 B. W. Kernighan & P. J. Plauger Software Tools in Pascal v. 168 Find is modeled after the Unix utility grep (globally look for regular expressions and print).

1991 UnixWorld Aug. 125/2 Perl uses egrep-style regular expressions, in which backslashes indicate literal parentheses.

1998 Euralex '98 Proc. II. vi. 448 The corpus queries are written in the CQP corpus query language, which uses regular expressions over part-of-speech tags, lemmas,..and sentence boundaries.

2005 Richmond (Virginia) Times Disp. (Nexis) 12 June d9 Writing regular expressions requires a lot of patience and will often make your head spin like that poor kid in The Exorcist.

This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022).

单词	regular expression
释义	regular expressionn. Brit. /ˌrɛɡjᵿlər ᵻkˈsprɛʃn/, /ˌrɛɡjᵿlər ɛkˈsprɛʃn/, U.S. /ˌrɛɡ(jə)lər ɪkˈsprɛʃ(ə)n/, /ˌrɛɡ(jə)lər ɛkˈsprɛʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: regular adj., expression n. Etymology: < regular adj. + expression n.The current meaning may derive from the following, where the meaning is somewhat different:1956 S. C. Kleene in C. E. Shannon & J. McCarthy Automata Stud. 26 By a regular expression, we shall mean a particular way of expressing a regular set of [truth] tables starting with sets of tables for definite events and applying zero or more times the three operations. Computing. A series of characters and symbols that express both a string or strings to be searched for within textual data and conditions or restrictions of the search, in a way that is compatible with automated searching. ΚΠ 1971 K. L. Thompson U.S. Patent 3,568,156 2/1 A regular expression..is a concatenation of characters and operators representing symbolically all of the possible character strings which produce successful matches. 1981 B. W. Kernighan & P. J. Plauger Software Tools in Pascal v. 168 Find is modeled after the Unix utility grep (globally look for regular expressions and print). 1991 UnixWorld Aug. 125/2 Perl uses egrep-style regular expressions, in which backslashes indicate literal parentheses. 1998 Euralex '98 Proc. II. vi. 448 The corpus queries are written in the CQP corpus query language, which uses regular expressions over part-of-speech tags, lemmas,..and sentence boundaries. 2005 Richmond (Virginia) Times Disp. (Nexis) 12 June d9 Writing regular expressions requires a lot of patience and will often make your head spin like that poor kid in The Exorcist. This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022). < n.1971
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