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Posted By

DrPepper on 05/26/11


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inherited class

 / Published in: Ruby
 

Mammal class as "super class" cat class as "sub class"

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  1. ruby> class Mammal
  2.     |    def breathe
  3.     |       puts "inhale and exhale"
  4.     |    end
  5.     | end
  6.    nil
  7. ruby> class cat<Mammal
  8.     |    def speak
  9.     |       puts "Meow"
  10.     |    end
  11.     | end
  12. ERR: <main>: class/module name must be CONSTANT
  13. class cat<Mammal
  14.           ^
  15. ruby> class Cat< Mammal
  16.     |    def speak
  17.     |       puts "Meow"
  18.     |    end
  19.     | end
  20.    nil
  21. ruby> tama = Cat.new
  22.    #<Cat:0x00000001094628>
  23. ruby> tama.breathe
  24. inhale and exhale
  25.    nil
  26. ruby> tama.speak
  27. Meow
  28.    nil

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