# functor.rb

Path: | lib/core/facets/functor.rb
Last Update: | Sat Dec 03 12:31:51 +0000 2011

By definition a Functor is simply a first class method, but these are common in the form of Method and Proc. So for Ruby a Functor is a more specialized as a Higher-order function or Metafunction. Essentally, a Functor can vary its behavior accorrding to the operation applied to it.

      f = Functor.new { |op, x| x.send(op, x) }
      (f + 1)  #=> 2
      (f + 2)  #=> 4
      (f + 3)  #=> 6
      (f * 1)  #=> 1
      (f * 2)  #=> 4
      (f * 3)  #=> 9

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