From: "David A. Black" <dblack@...>
Date: 2004-07-29T12:07:21+09:00
Subject: Re: Automatically setting attributes

Hi --

On Thu, 29 Jul 2004, Laughlin, Joseph V wrote:

> > -----Original Message-----
> > From: David A. Black [mailto:dblack@wobblini.net] 
> > Sent: Wednesday, July 28, 2004 7:39 PM
> > To: ruby-talk ML
> > Subject: Re: Automatically setting attributes
> > 
> > 
> > Hi --
> > 
> > On Thu, 29 Jul 2004, Mehr, Assaph (Assaph) wrote:
> > 
> > > 
> > > > How can I do something like the following:
> > > 
> > > > class Foo
> > > >    attr_accessor :goo, :moo
> > > >    def initalize
> > > >       @attr.each { | attrib| attrib = 0 }
> > > 
> > > 	  [:goo,:moo].each { |sym| send "#{sym}=", 0 }
> > > or:
> > > 	  [:goo,:moo].each { |sym| instance_eval "@#{sym} ||= 0" }
> > > 
> > > >    end
> > > > end
> > 
> > You could also use: instance_variable_set("@#{sym}",0)
> > (which might be more self-documenting).
> > 
> > 
> > David
> > 
> 
> Do those methods have any advantages over doing
> 
> @goo, @moo = 0, 0
> 
> ? 

As Assaph said, not really if you know the names in advance.  I hadn't
really picked up on that.  But I don't mind putting in a good word for
#instance_variable_set :-)


David

-- 
David A. Black
dblack@wobblini.net