From: Timothy Goddard <interfecus@...>
Date: 2006-09-05T21:30:18+09:00
Subject: Re: Does an instance know his own name?

You can identify an object by its object_id. Variables are just
references to an object with a convenient name for your use. If you
want to give an object an actual name, you have to pass it in as a
parameter on construction.

Geoff Barnes wrote:
> If a class has built checks and raises an exception if it finds
> something wrong, how can I tell which instance had the error?  I know
> there's an object_id, but can I know the name of the objects own
> instance variable?
>
> huey = Nephew.new
> duey = Nephew.new
> luey = Nephew.new
>
> duey.raise_error_on_purpose_just_for_fun #-> "Nephew 'duey' raised an
> error"
>
> Also, can an instance know his 'path' from the top-level?
>
> class Donald
>
>  def initialize
>    @huey = Nephew.new
>    @duey = Nephew.new
>    @luey = Nephew.new
>  end
>
> end
>
> Donald1 = Donald.new
> Donald2 = Donald.new
>
>  Donald1.huey.raise_error_on_purpose_just_for_fun
>  #-> "Nephew Donald1.huey raised an error"
>
> Thanks,
> 
> 
> 
> 
> 
> -- 
> Posted via http://www.ruby-forum.com/.