From: Scott Rubin <srubin@...>
Date: 2004-06-25T21:58:05+09:00
Subject: Re: Is it considered Harmful?

I can't possibly imagine it being useful to do this except when the 
objects have very similar, if not identical, instance variables. And in 
cases where this is true we have these things we call polymorphism and 
inheritance. Lets say you have a parent class of animal with two 
subclasses cat and dog.  But both cat and dog have the same data.  Name, 
gender, breed, color, etc.  There should never be a need to turn a cat 
into a dog or vice versa. If you are programming properly you would only 
deal in objects of type animal. If by some strange change a dog turned 
into a cat through genetic engineering you would simply make a new 
instance of object cat and copy the data from the former dog object into 
it.  Then delete the dog object.  It is only in this one case that I see 
your example being slightly useful, but only for code saving reasons. If 
someone else has more insight I would love to hear it.

-Scott

rolo wrote:
> Hi
> 
> obj.class = MyClass
> 
> Is it harmful?
> 
> rolo
> 
> 
> 
>