Calling a method of a Ruby Singleton without the reference of 'instance'

Question

I would like to call a method of a Singleton Object without the reference to its instance

SingletonKlass.my_method

instead of

S         


        

Answer 1

Using forwardable and def_delegators:

require 'singleton'    
require 'forwardable'

class SingletonKlass
  include Singleton
  class << self
    extend Forwardable
    def_delegators :instance, :my_method
  end

  def my_method
     puts "hi there!!"
  end
end

SingletonKlass.my_method

Edit: If you want to include all the methods you've defined yourself, you could do

require 'singleton'    
require 'forwardable'

class SingletonKlass
  include Singleton

  def my_method
     puts "hi there!!"
  end

  class << self
    extend Forwardable
    def_delegators :instance, *SingletonKlass.instance_methods(false)
  end
end

SingletonKlass.my_method