From: James Edward Gray II Date: 2006-03-15T04:04:14+09:00 Subject: Re: Small optimization tips On Mar 14, 2006, at 12:59 PM, Charlie Bowman wrote: > I'm still new to ruby, but what does this mean? The Set library is a standard library that comes with Ruby. I believe it uses rbtree if it can be loaded or a plain Hash otherwise, but it supports the expected set operations and keeps the contents unique. James Edward Gray II