From: Daniel Berger <djberg96@...>
Date: 2005-07-22T11:00:56+09:00
Subject: Re: Odd Array#[x..y] return values

Ara.T.Howard wrote:
> On Fri, 22 Jul 2005, Daniel Berger wrote:
>
> > Hi all,
> >
> > Ruby 1.8.2
> >
> > Consider:
> >
> > irb(main):001:0> a = []
> > => []
> > irb(main):002:0> a[0..1]
> > => []
>
>    start at a legitimate index and continue with every possible index until the
>    end, not matter where that is
>
> > irb(main):003:0> a[-2..-1]
> > => nil
>
>    start at a illegitimate index and return that there cannot be anything after
>    this - ergo 'nil'
>
> > Why does the first return [] and the second return nil?
>
> or at least that makes sense to me...
>
> cheers.
>
> -a

Please explain how one is "legitimate" and the other is not.  In both
cases, the indices do not exist.

Regards,

Dan