Michael Shfaer's Death Racer Robot Program ... (a good example of filling Classes with modules)

gistfile1.txt

module Wheeled
  def wheeled?
    true
  end
  def roll
    puts "Yeah, buddy"
  end
end
 
module Wooden
  def bendy?
    true
  end
  def bend
    puts "Wicked!"
  end
end
 
module Racer
  def race(other)
    return "NO RACE!!!!!" unless other.respond_to? :speed
    if self.speed > other.speed
      "I WIN"
    else
      "I DO NOT WIN"
    end
  end
end
 
module PickyTolerances
  def ignore_engine_light
    @broken_down = "you silly person"
  end
  def speed
    return "1 minute, gotta fix" if @broken_down
    return speed_when_maintained
  end
end
 
class AutonomousDeathRobot
  include Wheeled
  include Racer
  include PickyTolerances
  def speed_when_maintained
    "y you run? i freind!!?!"
  end
end
 
class Car
  include Wheeled
  include Racer
  include PickyTolerances
  def speed_when_maintained
    if @driver[:impaired]
      return "AAAAAH I CRASHED"
    else
      return driver_speed
    end
  end
  def driver_speed
    @driver[:speed]
  end
  def strap_in(driver)
    @driver = driver
  end
  def peek_in
    @driver
  end
  def to_s
    "A car, with a driver whose speed is #{@driver[:speed]}"
  end
end
 
class Sadness
  def speed
    "relatively fast"
  end
end
 
class Skateboard
  include Wheeled
  include Wooden
  include Racer
  def speed
    "super fast"
  end
end
 
class Rollerblade
  include Wheeled
  include Racer
  def bendy?
    false
  end
  def speed
    "pretty fast"
  end
end
 
class Ski
  include Wooden
  include Racer
  def wheeled?
    false
  end
  def speed
    "uber fast"
  end
end