From: "Ara.T.Howard" <ara.t.howard@...>
Date: 2005-11-17T03:15:28+09:00
Subject: Re: Proposed RCR: Object#replace

On Thu, 17 Nov 2005, Austin Ziegler wrote:

> On the Sydney list, Daniel Berger has been asking about a generic
> Object#replace call to work similarly to Hash#replace, String#replace,
> and Array#replace. I see no reason that this could not be implemented
> for all objects. At a simplistic level, this is:
>
>    class Object
>      def replace(other)
>        other.instance_variables.each do |name|
>          instance_variable_set(name, other.instance_variable_get(name))
>        end
>      end
>    end


   class SpecialFile < ::File
   end

   a = SpecialFile::new '4.txt', 'w'
   b = SpecialFile::new '2.txt', 'w'

   b.replace a

   a.close

   b << 42 # exception!

i see where you are coming from, but wouldn't this more accurately be called
something like Object#refer since all instance vars will then be shared?

regards.

-a
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