From: Andrew Johnson <ajohnson@...>
Date: 2004-03-30T17:09:26+09:00
Subject: Re: Surprise with Hash#new

 On Tue, 30 Mar 2004 07:28:40 +0000 (UTC), Luis D Casillas
 <casillas@no_spam.Stanford.EDU> wrote:

> PS I ended up not needing that data structure, but after seeing my
> mistake I managed to get the behavior I wanted this way:

Alternatively, Hash.new can take a block to generate default values:

  @seen = Hash.new {|h,k| h[k] = []}

regards,
andrew