From: "Hal E. Fulton" <hal9000@...>
Date: 2003-05-09T07:52:25+09:00
Subject: Re: Can a global be a constant?

----- Original Message ----- 
From: "Brian Candler" <B.Candler@pobox.com>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, May 08, 2003 5:44 PM
Subject: Re: Can a global be a constant?


> On Fri, May 09, 2003 at 07:04:40AM +0900, Jim Freeze wrote:
> > Ok. I didn't realize that $, @, and @@ were considered part
> > of the name. Makes sense now.
> 
> And you'll see this if you try to access one of these things using the
> symbol:
> 
>   class Foo; end
>   a = Foo.new
>   a.instance_variable_set(:@bar,1) #>> OK
>   a.instance_variable_set(:bar,1)  #>> NameError: 'bar' is not an
>                                        instance variable name

Yet this is potentially confusing, because a 
line like attr_accessor :foo does create an 
accessor for @foo.

I suppose the rationale is that you're specifying
the symbol corresponding to the method name rather
than the instance variable.

Hal