Programming Ruby 3.3

Regexp

The Regexp class is the Ruby representation of a regular expression. We discussed the basic syntax of regular expressions at length in Chapter 8, ​Regular Expressions​. Here we focus on the API for the Regexp class itself and then cover some advanced regular expression syntax.

You can create a regular expression using the literal syntax, which is two foreword slashes with the regular expression in the middle, such as /.*rb/. (All the escape sequences and whatnot inside the slashes are discussed in Chapter 8, ​Regular Expressions​. The alternate delimiter %r{...} will also create regular expressions.

The method, Regexp.new(string, options = 0, timeout: nil) creates a new regular expression with the string argument as the pattern. The ...