From: Robert Dober <robert.dober@...>
Date: 2008-01-31T07:42:34+09:00
Subject: Re: counting the number of repititions in an array

A small 1.9 solution

p 100.times.
  map{rand(5)}.
  inject(Hash.new(0)){|h,e| h.update e => h[e].succ}

Robert