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以前在讲类的时候总喜欢举猫抓老鼠的例子，今天写了一个Ruby版，稍后献上Ruby语法速查

 

class Cat
  def initialize(name, speed)
    @name = name
    @speed = speed
  end
   
  def catch(rat)
    if @speed > rat.speed
      puts @name + " CAN catch " + rat.name
    else
      puts @name + " CAN NOT catch " + rat.name
    end
  end
end
   
class Rat

  attr_reader :speed
  attr_reader :name
  def initialize(name, speed)
    @name = name
    @speed = speed
  end
 end
 
tom = Cat.new('Tom', 60)
jerry = Rat.new('Jerry', 50)
 
tom.catch(jerry)