From: Martin DeMello <martindemello@...>
Date: 2005-10-11T18:26:54+09:00
Subject: Re: Sort pseudo-lists

pete boardman <pete.boardman@pobox.com> wrote:
> On 10 Oct 2005, at 22:53, James Edward Gray II wrote:
> 
> > arr = eval "{{3.1, 1.3, 2.5, 2.1}, {2.1, 3.1, 2.4, 2.2}, {1.4, 2.2,  
> > 2.1, 4.2}}".tr("{}", "[]")
> > arr.sort { |a, b| a.first <=> b.first }
> 
> Thanks, James - simple, elegant, and nearly perfect! Is it easy to  
> sort the array of arrays by their second, third, and fourth entries  
> as well:

That's actually the default behaviour, so you can just say arr.sort

martin