From: David Alan Black <dblack@...>
Date: 2002-07-17T06:23:11+09:00
Subject: Re: TkText no -textvariable workaround?

Hi --

On Wed, 17 Jul 2002, Hal E. Fulton wrote:

> ----- Original Message -----
> From: "ts" <decoux@moulon.inra.fr>
> To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
> Cc: <ruby-talk@ruby-lang.org>
> Sent: Tuesday, July 16, 2002 12:23 PM
> Subject: Re: TkText no -textvariable workaround?
>
>
> > >>>>> "N" == Nat Pryce <nat.pryce@b13media.com> writes:
> >
> > N> If self has an attribute named 'a', then the receiver is self, and the
> > N> method is 'a='.
> >
> >  No, `a' is always interpreted as a local variable in this example
>
> Very perceptive. True even if
> you do this:
>
>   class Object
>     attr_accessor :a
>   end
>
> Within the object, I guess you
> always need self to access something
> like this. Any exceptions to this?

I think that the only case you have to use self is when you're doing
assignment (to prevent it from being taken for a local variable).  If
you're calling a reader method, you can do just 'a':

  irb(main):001:0> class Thing; attr_accessor :a; def thing; puts a;
  end; end
  nil
  irb(main):002:0> t = Thing.new; t.a = 3; t.thing
  3


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav