From: Robert Klemme <bob.news@...>
Date: 2005-04-12T23:49:43+09:00
Subject: Re: extension question: hiding block proc


"Dave Lee" <dave.lee.wilson@gmail.com> schrieb im Newsbeitrag
news:bedf97cd050412061816c882d2@mail.gmail.com...
> Hi all,
>
> I have an each method where the value being yielded is an instance of
> an Array subclass, created with rb_class_new_instance(argc, argv,
> myClass).  Clearly, the each method is being passed a block.  My
> problem is that my Array subclass basically calls super(size), which
> sees the block given to my each method, and yields to it.  This means
> my each method is getting called an additional n times, where n is the
> size of my array subclass instance.  How can I hide, mask, or
> temporarily remove the given block when I call the array constructor,
> but still have it in place when my each method calls yield?  I've
> looked at the ruby source, but can't see anything obvious.

I find it difficult to translate what you wrote correctly.  Do you do the
equivalent of this?

class ASub < Array
  def initialize(size)
    super(size)
  end
end

class AnotherClass
  def each
    yield ASub.new(10)
  end
end

I don't see how that could call your each method additional times.  If at
all the block is invoked several times from Array#initialize.  Maybe you
better post your original code...

Kind regards

    robert