Wrapping class singleton (eigen) methods with a module

gistfile1.rb

# Note: MyFinalApproach defines a block that takes a block,
# which only works with Ruby >= 1.9. To work with 1.8, you'll need
# to take that bit out.
# Also, I think 'eigen' contains more phonetic badassery than
# 'singleton', which is the real reason I prefer it.

require 'forwardable'

class SomeClass
  def self.my_eigen_method; 42; end
  def self.my_other_eigen_method; :truck; end
end

module MyModule
  class << self
    extend Forwardable
    def_delegators :real_receiver, :my_eigen_method, :my_other_eigen_method
    def real_receiver; SomeClass; end
  end
end

module MyOtherApproach
  extend Forwardable
  extend MyOtherApproach

  def_delegators :real_receiver, :my_eigen_method, :my_other_eigen_method

  def real_receiver; SomeClass; end
end

module MyFinalApproach
  extend MyFinalApproach

  SomeClass.singleton_methods.each do |meth|
    define_method(meth) do |*args, &blk|
      SomeClass.__send__ meth, *args, &blk
    end
  end
end

puts "And the winner is: #{MyModule.my_eigen_method}"
puts "And the other winner is: #{MyOtherApproach.my_eigen_method}"
puts "And the final winner is: #{MyFinalApproach.my_eigen_method}"