From: Carlos <angus@...>
Date: 2003-08-12T22:36:10+09:00
Subject: Re: Ruby and OOP-design (question of an old "procedural person" ;)

>  Then I thought of a list first sorted by time and then by frequency
>  and wrote 
> 
> 	   @list.sort_by { |item| [item[2], item[0] ] }
> 
>  and astonishly Ruby quaks ;) with :
> 
>  swlist:62:in `sort_by': comparison of Array with Array failed (ArgumentError)
>         from swlist:62

One or more of your times is nil.