From: Tom Ha <tom999@...>
Date: 2009-08-10T00:54:31+09:00
Subject: How to define doubles: Array-to-hash

Hi there,

Assume the following array (contains doubles):

   original = [1, 2, 3, 3, 3, 3, 4, 4, 5]

What's the most efficient way to obtain a hash that tells me what
elements of "original" have more than 1 appearance/entry (= doubles)?

The result should look like this:

   result = {"3"=>4, "4"=>2}

Thanks for your help!
Tom-n00b
-- 
Posted via http://www.ruby-forum.com/.