Regular Expression Pocket Reference, 2nd Edition

Name

Regexp

Description

Holds a regular expression that is used to match a pattern against strings.

Class Methods

escape(string) => escaped_stringquote(string) => escaped_string

Escape regular expression metacharacters, so they aren’t interpreted when used inside a regular expression pattern.

last_match => matchdatalast_match(n) => string

Return the MatchData of the last successful match, or the nth field in the MatchData object.

Regexp.new(pattern [, options [, lang]]) => regexpRegexp.compile(pattern [, options [, lang]]) => regexp

Create a new Regexp object from a regular expression pattern. Options can be an OR’d combination of Regexp::EXTENDED, Regexp::IGNORECASE, and Regexp::MULTILINE. The lang parameter enables multibyte support for the regexp: 'n', 'N' = none, 'e', 'E' = EUC, 's', 'S' = SJIS, 'u', 'U' = UTF-8.

Regexp.union([pattern]*) => new_str

Create a Regexp object that is the union of given patterns joined by the alternation operator, where each pattern is either a pattern string, or a Regexp object.

Instance Methods

regexp == second_regexp => booleanregexp.eql?(second_regexp) => boolean

Return true if two Regexp objects are based on identical patterns, and have the same character set code and mode options.

match(string) => matchdata or nil

Return a MatchData object describing the match, or nil if there was no match.

casefold? => true or false

Return true if IGNORECASE is set for the entire pattern.

inspect => string

Return a string representation of the Regexp object.

kcode => string ...