From: Ashley Moran <work@...>
Date: 2007-10-13T21:41:55+09:00
Subject: Re: Generation of initialize

On Oct 13, 2007, at 1:20 pm, arcadiorubiogarcia@gmail.com wrote:
> Hi everyone,
>
> I'm new to Ruby. I'm looking for an elegant solution to a simple
> problem.
>
> I have some classes like this one in my code:
>
>
> class A
>
> attr_reader :a1, a2
>
> def initialize(a1, a2)
>   @a1 = a1
>   @a2 = a2
> end
>
> end
>
>
> I'm looking for a way in order not to have to define the initialize
> method in each class. Struct doesn't fit my needs since due to single
> inheritance I can't have any other superclass, and I would like to.
>
> Any suggestions?
>
> Thanks in advance.
>
>

Hi

Don't know if this has been done before, but here's a quick stab I  
took at it:

   require 'generator'

   module InitializesWith
     def initializes_with(*params)
       define_method :initialize do |*args|
         iterator = SyncEnumerator.new(params, args)
         iterator.each do |param, arg|
           instance_variable_set "@#{param}", arg
         end
       end
     end
   end

   class Class
     include InitializesWith
   end

   class C
     attr_reader :x, :y, :z
     initializes_with :x, :y, :z
   end

   obj = C.new(1,2,3)

   obj.x # => 1
   obj.y # => 2
   obj.z # => 3


Any good?

Ashley


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