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Bind the parent's method to the child objects

/ Published in: Ruby
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  1. # encoding: utf-8
  2.  
  3. class Parent
  4.   attr_reader :one, :two
  5. end
  6.  
  7. class FirstChild < Parent
  8.   def initialize
  9.     @one = 'first one'
  10.     @two = 'first two'
  11.   end
  12. end
  13.  
  14. class SecondChild < Parent
  15.   def initialize
  16.     @one = 'second one'
  17.     @two = 'second two'
  18.   end
  19. end
  20.  
  21. one = Parent.new.method(:one).unbind
  22. two = Parent.new.method(:two).unbind
  23.  
  24. puts one.bind(FirstChild.new).call  #=> first one
  25. puts two.bind(FirstChild.new).call  #=> first two
  26.  
  27. puts one.bind(SecondChild.new).call #=> second one
  28. puts two.bind(SecondChild.new).call #=> second two

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