Composition

gistfile1.rb

Inheritance Model

class Car
  attr_reader :color, :wheels, :cost
 
  def initialize(args)
    @wheels = 4
    @color = args[:color]
    @cost = :respectible
  end
end
 
class Ferarri < Car
  def initialize(args)
    super(args)
    @cost = :expensive
  end
end
 
class Yugo < Car
  def initialize(args)
      super(args)
      @cost = :dirt
  end
end


Composition Model

class Luxury
  attr_reader :color, :wheels, :cost
 
  def initialize(args)
    @wheels = 4
    @color = args[:color]
    @cost = args[:cost]
  end
end
 
class Ferarri
  attr_reader :luxury

  def initialize(args)
    @luxury = Luxury.new({color: args[:color], cost: args[:cost]})
  end
end
 
class Yugo
  attr_reader :luxury
  
  def initialize(args)
    @luxury = Luxury.new({color: args[:color], cost: args[:cost]})
  end
end