Global Instance Pattern

inflection.rb

require "forwardable"

module Inflection
  class Inflector
    def pluralize(string)
      string + "s"
    end
  end

  class << self
    extend Forwardable

    # Delegate all supported instance methods to the global instance.
    #
    def_delegators :global, *(Inflection::Inflector.instance_methods - Inflection.methods)

    def global
      @global ||= Inflector.new
    end
  end
end

# Provide a global, default inflector out of the box:
#
Inflection.pluralize("bird")

# Or build your own:
#
Inflection::Inflector.new