From: "Hal E. Fulton" <hal9000@...>
Date: 2003-05-30T04:26:27+09:00
Subject: Re: Iteration - last detection

----- Original Message -----
From: "Orion Hunter" <orion2480@hotmail.com>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, May 29, 2003 2:14 PM
Subject: Iteration - last detection


> Is there any built in functionality for iteration that will allow me to
> detect when I am on the last element?  This would not be hard for an
Array,
> using array.length, but what about a Hash?  How would I know when I am at
> the last element?

That's something I've been interested in.
Search for "super-iterator" in the ML archives.

I don't know that there's a solution in general
unless you build your own solution.

Actually, though, you can know the number of elements
in a hash just as you can an array ('length' or 'size'
as a synonym, just as for arrays). If you don't mind
keeping a counter, that works fine.

Hal