From: Dorren <dorrenchen@...>
Date: 2007-01-25T08:05:06+09:00
Subject: Re: can it be shorter?

a little clearer than previous one.

  hash = Hash[*hash.inject([]){|arr, (k, v)|
                               arr += Array === k ? k.zip([v]* k.size)
: [k, v]
                             }.flatten]