From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-04-11T20:41:11+09:00
Subject: How to duplicate a object changing the class without attributes memory copy

Hi, I'm doing a server and want to avoid memory innecesary operations.
I have an array of headers:
  headers_array

Each header is an object of "Header" class:

	class Header
		attr_accessor :name, :body
		def initialize(name, body)
			@name = name
			@body = body
		end
	end


There are also others specific headers soons of "Header" class:

	class From < Header
		attr_accessor :uri
	end


At the beggining "headers_array" just contain "Header" objects but
after inspection I want to replace the header with @name='From' with a
"From" object but since "name" and "body" attributes are the same I
don't want a memory copy operation to allocate space for new object.

This is: I just want to change the Class of a "Header" object to
"From" class, keeping the attributes without memory copy operation, is
there any way? I imagine in C I'd do it by using pointers.


Thanks for any help.



-- 
Iñaki Baz Castillo
<ibc@aliax.net>