From: Daniel Berger <djberg96@...>
Date: 2005-07-22T23:00:57+09:00
Subject: Re: Odd Array#[x..y] return values



David A. Black wrote:
> Hi --
>
> On Fri, 22 Jul 2005, daz wrote:
>
> >
> > Daniel Berger wrote:
> >> Hi all,
> >>
> >> Ruby 1.8.2
> >>
> >> Consider:
> >>
> >> irb(main):001:0> a = []
> >> => []
> >> irb(main):002:0> a[0..1]
> >> => []
> >> irb(main):003:0> a[-2..-1]
> >> => nil
> >>
> >> Why does the first return [] and the second return nil?
> >>
> >
> >
> > Archive reading:
> > http://groups.google.com/groups?threadm=BAY22-F7pSWerOc0Ne000000288@hotmail.com
>
> I'll perhaps superfluously report the results of my digging, as long
> as I've done it :-)  See the ruby-talk threads starting at:
>
> 10136
> 24700
> 84973
>
> In the first of these, Matz talks about the index pointing at an
> (imaginary) edge between elements.
>
>
> David

Thanks David and Daz.

Maybe this should go in the FAQ. :)

Regards,

Dan