From: paron <rphillips@...>
Date: 2009-06-12T23:30:13+09:00
Subject: Re: Idiomatic way to detect first/last iteration?

On Jun 12, 8:41 am, Gary Wright <gwtm...@mac.com> wrote:
> On Jun 12, 2009, at 7:45 AM, paron wrote:
>
> >  first_record=records.shift
> >  last_record=records.pop
>
> You can't use 'shift' and 'pop' if you want the
> solution to work with *any* enumerable object.
>
> It just depends how general a solution you are
> looking for.

Good point; I'd forgotten that case.

There's really no inherently meaningful "first" or "last" with a Hash,
so I ignored it. In fact, couldn't you consider "first" and "last"
meaningless for any Enumerable that isn't indexed? Maybe the question
shouldn't be about Enumerable.

Anyway, good catch.

Ron