From: Edward Faulkner <ef@...>
Date: 2005-10-26T03:24:36+09:00
Subject: Re: having reference problems

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On Wed, Oct 26, 2005 at 03:02:03AM +0900, shalperin wrote:
> What I am trying to do is refer to an instance variable both by its=20
> index in some array, and also directly.

How about this? =20

class Referenceable
  def self.attr_reference(*attrs)
    @vars ||=3D []
    @vars +=3D attrs
    attr_accessor *attrs
    v =3D @vars
    define_method(:reference) do |i|
      self.send(v[i])
    end
  end
end

class Foo < Referenceable
  attr_reference :a,:b
end

f =3D Foo.new
f.a =3D 'this is a'
f.b =3D 'this is b'
f.reference(0)
=3D> 'this is a'
f.reference(1)
=3D> 'this is b'

regards,
Ed

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