From: Ryan Davis <ryand-ruby@...>
Date: 2007-07-23T15:48:41+09:00
Subject: Re: array permutations


On Jul 22, 2007, at 21:52 , Alex Ciarlillo wrote:

> The other day I ran into a problem where I needed all the permutations
> of a given array. I knew I had covered this in some of my CS  
> classes but
> couldn't come up with the algorithm at first. I figured it out on the
> drive home from work and decided to rubify it and add it as a  
> method to
> the array class. This is what I came up with and was just wondering if
> anyone else had a cleaner or more effecient way of accomplishing this.

The one thing I learned in Algs is someone has invented/implemented/ 
tested it before me:

	http://rubygarden.org/Ruby/page/show/ArrayPermute

Please use google.