From: David Alan Black <dblack@...>
Date: 2001-09-08T23:59:34+09:00
Subject: [ruby-talk:21002] Re: destructor

Hello --


On Sat, 8 Sep 2001, Ned Konz wrote:

> I'm new to Ruby, so sorry if I'm asking a FAQ:
>
> On Friday 07 September 2001 02:38 pm, Dave Thomas wrote:
> > "Nat Pryce" <nat.pryce@b13media.com> writes:
> > > Ruby uses blocks to scope resource allocation and deallocation to scopes
> > > , just like C++ does with constructors/destructors.  Look at the
> > > File::open method for an example.
> >
> > I liked Nat's idea a lot, so how about this:
> >
> >      module Resource
> >        def Resource.append_features(to)
> >          def to.use(*params, &blk)
> >            obj = new(*params, &blk)
>
> Why are you passing the block to new() here? What if it doesn't take one?


The &blk thing is provisional, like *params:

  candle:~$ ruby -w
  def thing(*args,&blk)
    puts "no block" unless blk
  end

  thing
  ^D
  no block


David

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