Composition - OOP

composition.rb

# when a class uses another object to provide some or all of its functionality
class Movement

  def step
    puts "stepping"
  end

  def crawl
    puts "crawling"
  end

end

class Human
  def initialize
    @movement = Movement.new
  end

  def move
    @movement.step
  end
end


class Raccoon
  def initialize
    @movement = Movement.new
  end

  def move
    @movement.crawl
  end
end

human = Human.new
raccoon = Raccoon.new
human.move
raccoon.move