Pasted

class Duck
  def initialize
  end
 
  def speak
    "Quack"
  end
end
 
class Dog
  def initailize
  end
 
  def speak
    "Arf"
  end
end
 
module LooseSpeak
  def self.speak(obj)
    obj.speak
  end
end
 
dog = Dog.new
duck = Duck.new
 
dog.speak # => "Arf"
duck.speak # => "Quack"
 
LooseSpeak::speak dog # => "Arf"
LooseSpeak::speak duck # => "Quack"