From: James Edward Gray II <james@...>
Date: 2006-03-17T23:15:42+09:00
Subject: Re: Card tricks with Ruby

On Mar 17, 2006, at 7:04 AM, Farrel Lifson wrote:

> I think you're confusing the <=> operator needed to mixin Enumerable.

Technically, the only method required by Enumerable is each().  You  
do need to provide <=>() if you want to use method like sort(), min 
(), or max() without a block though.

The Comparable mix-in requires <=>().

James Edward Gray II