From: Jim Freeze <jim@...>
Date: 2004-02-26T04:21:20+09:00
Subject: Re: Slice or Value of Empty Array

On Thursday, 26 February 2004 at  3:56:57 +0900, Austin Ziegler wrote:
> On Thu, 26 Feb 2004 03:34:03 +0900, Jim Freeze wrote:
> > Hi
> > I am puzzling about the following:
> (reformatted)
> 
>   p [][0..0]    # => []
>   p [][0..-1]   # => []
>   p [][-1..-1]  # => nil
> 
> > If ary[n..n] returns a slice, then why does a[0..0] give me an
> > empty array and a[-1..-1] give me nil?
> 
> Matz explained this some time ago. I think it has something to do
> with indexes sitting *between* elements in Ruby arrays, and the last
> element being precached as empty.
> 
> I'm not sure if that makes any sense...

Hmm, vaguely. Do you have the reference?


-- 
Jim Freeze

Philosophy will clip an angel's wings.
		-- John Keats