From: Michal Suchanek <hramrach@...>
Date: 2007-12-19T19:20:15+09:00
Subject: Re: String#[] behaviour

On 19/12/2007, MonkeeSage <MonkeeSage@gmail.com> wrote:

> No, because "-1" is a special value...it's got magic in it. It can
> magically mean 5, or 10, or even 12 (because it's magic). ;) "-1" is
> just sugar for #length, and #length is always a side-effect of a
> container, whereas '0' is a constant entry point.

-1 is as constant as 0. And because of its magic when used as
container index it always means the end. And really length - 1, not
just length. And at that place there is always the last object unless
the container is empty. The same way as the first object is at 0.

Thanks

Michal