Class: Functor

Inherits:
Object show all
Defined in:
lib/core/facets/functor.rb

Overview

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

Constant Summary collapse

EXCEPTIONS =

< BasicObject

[:binding, :inspect, :object_id]

Instance Method Summary collapse

Constructor Details

#initialize(&function) ⇒ Functor

Returns a new instance of Functor.



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# File 'lib/core/facets/functor.rb', line 50

def initialize(&function)
  @function = function
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(op, *args, &blk) ⇒ Object (private)

Any action against the functor is processesd by the function.



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# File 'lib/core/facets/functor.rb', line 72

def method_missing(op, *args, &blk)
  @function.call(op, *args, &blk)
end

Instance Method Details

#to_proc ⇒ Object 



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# File 'lib/core/facets/functor.rb', line 55

def to_proc
  @function
end