4wk_1c_dog.rb

class Dog
  def initialize name
    @name = name
  end

  def teach_trick(trick, &code)
    define_singleton_method(trick, &code)
  end

  def method_missing(trick)
    puts "#{@name} doesn't know how to #{trick}"
  end
end

d = Dog.new('Lassie')
d.teach_trick(:dance) { "#{@name} is dancing!" }
puts d.dance
d.teach_trick(:poo) { "#{@name} is a smelly doggy!" }
puts d.poo
d2 = Dog.new('Fido')
puts d2.dance
d2.teach_trick(:laugh) { "#{@name} finds this hilarious!" }
puts d2.laugh
puts d.laugh
d3 = Dog.new('Stimpy')
puts d3.dance
puts d3.laugh