From: Austin Ziegler <austin@...>
Date: 2004-02-26T03:56:57+09:00
Subject: Re: Slice or Value of Empty Array

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...

-austin
--
austin ziegler  * austin@halostatue.ca * Toronto, ON, Canada
software designer * pragmatic programmer * 2004.02.25
                    * 13.53.09