module Rack

Regexp has ‘match?` since Ruby 2.4 so to support Ruby < 2.4 we need to define this method

The Rack main module, serving as a namespace for all core Rack modules and classes.

All modules meant for use in your application are autoloaded here, so it should be enough just to require 'rack' in your code.

Source

# File lib/rack/version.rb, line 26
def self.release
  RELEASE
end

Return the Rack release as a dotted string.

Source

# File lib/rack/version.rb, line 19
def self.version
  VERSION.join(".")
end

Return the Rack protocol version as a dotted string.