How do you do polymorphism in Ruby?

Question

In C#, I can do this:

class Program
{
    static void Main(string[] args)
    {
        List animals = new List();

        anima         


        

Answer 1

The principle of duck typing is just that the object has to respond to the called methods. So something like that may do the trick too :

module Sleeping
  def sleep; puts "#{self} sleeps"
end

dog = "Dog"
dog.extend Sleeping
class << dog
  def make_noise; puts "Woof!" end
end

class Cat
  include Sleeping
  def to_s; "Cat" end
  def make_noise; puts "Meow!" end
end

[dog, Cat.new].each do |a|
  a.sleep
  a.make_noise
end