Ruby Monkey Patching Using Module

ruby_monkey_patching_using_module.rb

module M
  def test_method_with_module
    "Test from M"
  end
end

class C
  def test_method
    "Test from C"
  end
end

# for a plugin, these two lines would go in init.rb
C.send(:include, M)
C.class_eval { alias_method_chain :test_method, :module }

C.new.test_method # => "Test from M"