gistfile1.txt

# example of delegate pattern, using a car analogy
# e.g. the car delegates to engine
# .    ask the car to speed up, and the car will ask the engine to speed up
#
class Car
  def initialize(majors)
    @engine = Engine.new
  end

  def method_missing(meth, *args)
    @engine.respond_to?(meth) ? @engine.send(meth, *args) : super
  end

  def respond_to?(meth)
    super || @engine.respond_to?(meth)
  end
end

# now, let's say the car delegates to the chassis as well
# e.g. ask the car to get softer, and the car will ask the chassis to get softer
#
class Car
  delegate_to :engine
  delegate_to :chassis

  def initialize
    @engine = Engine.new
    @chassis = Chassis.new
  end
end 

# so, how do we write delegate_to?