From: "Ara.T.Howard" <ahoward@...>
Date: 2004-08-16T23:51:00+09:00
Subject: Re: returning symbols

On Mon, 16 Aug 2004, T. Onoma wrote:

> On Monday 16 August 2004 08:47 am, Daniel Cremer wrote:
>> Is there a way to get variables to return their symbol so you can access
>> what they will be referencing in the future ?
>
> class C
>  attr_accessor :a, :b, :c
>  def initialize
>    @a, @b, @c = 1, 2, 3
>  end
>  def bump
>    @a, @b, @c = 100, 200, 300
>  end
>  def ref
>    return [ lambda { @a }, lambda { @b }, lambda { @c } ]
>  end
> end
>
> c = C.new
> v = c.ref
> v.each { |q| puts q.call }
> c.bump
> v.each { |q| puts q.call }
>
> --
> T.

what does this give you over this?

   ~ > cat a.rb
   class C
     VARS = :a, :b, :c
     VARS.each{|v| attr_accessor v}
     def initialize
       @a, @b, @c = 1, 2, 3
     end
     def bump
       @a, @b, @c = 100, 200, 300
     end
     def ref
       VARS
     end
   end

   c = C.new
   vars = c.ref
   vars.each { |v| puts(c.send(v)) }
   c.bump
   vars.each { |v| puts(c.send(v)) }


   ~ > ruby a.rb
   1
   2
   3
   100
   200
   300


what am i missing here?

-a
--
===============================================================================
| EMAIL   :: Ara [dot] T [dot] Howard [at] noaa [dot] gov
| PHONE   :: 303.497.6469
| A flower falls, even though we love it;
| and a weed grows, even though we do not love it. 
|   --Dogen
===============================================================================