Regexp
class Regexp
A Regexp
holds a regular expression, used to match a pattern against strings. Regexps are created using the /.../
and %r{...}
literals, and by the Regexp::new
constructor.
Regular expressions (regexps) are patterns which describe the contents of a string. They're used for testing whether a string contains a given pattern, or extracting the portions that match. They are created with the /
pat/
and %r{
pat}
literals or the Regexp.new
constructor.
A regexp is usually delimited with forward slashes (/
). For example:
/hay/ =~ 'haystack' #=> 0 /y/.match('haystack') #=> #