From: Robert <bob.news@...>
Date: 2003-05-31T18:56:36+09:00
Subject: Re: Iteration - last detection


"Brian Candler" <B.Candler@pobox.com> schrieb im Newsbeitrag
news:20030530153346.GA8693@uk.tiscali.com...
> On Sat, May 31, 2003 at 12:09:00AM +0900, ts wrote:
> > >>>>> "B" == Brian Candler <B.Candler@pobox.com> writes:
> >
> > B> Did someone propose implementing each_with_last in terms of select?
> >
> >  see [ruby-talk:72510]
>
> Oh OK - make 'last?' a sort of pseudo-instance variable rather than
passing
> it as a parameter to each_with_last. Looks messy, as it splits the
iterator
> state: some carried by the iterator, and some carried outside it.

It *is* messy.  And it's exactly the reason why it will break concurrent
iterations.

    robert