From: Magicloud Magiclouds <magicloud.magiclouds@...>
Date: 2007-07-17T17:33:58+09:00
Subject: Re: What is the fastest way to convert a object?

Robert Klemme wrote:
> 2007/7/17, Magicloud Magiclouds <magicloud.magiclouds@gmail.com>:
>> Robert Klemme wrote:
>> > 2007/7/17, Ryan Davis <ryand-ruby@zenspider.com>:
>> >>
>> >> On Jul 16, 2007, at 22:56 , Magicloud Magiclouds wrote:
>> >>
>> >> > Class Test
>> >> >  def methodA
>> >> >    puts(@var1)
>> >> >  end
>> >> >  def initialize
>> >> >    @var1 = 0
>> >> >  end
>> >> > end
>> >> >
>> >> > obj = Object.new
>> >> > obj.instance_variable_set(:@var1, 2)
>> >> >
>> >> >
>> >> > # Now I want obj to be Test's instance, so I can
>> >> > obj.methodA
>> >> > # How to do this quickly?
>> >>
>> >> You don't. Ruby is strongly typed, which means that things don't just
>> >> "morph" into other types of things automatically or manually.
>> >> Specifically, you can't (without voodoo) set an instance's class.
>> >
>> > Adding to that: MM, what problem are you trying to solve?
>> >
>> > robert
>> >
>> >
>> I am using DRb, and I have many data models need to be generated on
>> server and sent to client. So I think a smaller object would be better.
>> Right?
> 
> Maybe, maybe not.  Here are my 0.02 EUR:
> 
> 1. I'd verify that "large" objects are really an issue
> 2. I'd make conversion explicit by means ot a #to_xyz method, i.e.
> receive an object and invoke obj.to_your_real_stuff on it.
> 
> Kind regards
> 
> robert
> 
> 
Yes, this is my problem, too.
I need an efficient way to transfer data model, but it seems that drb is 
not just "transfer".
Even if I ignore the object size thing, still, calling a drbObject's 
complex method is an issue.