From: tho_mica_l <micathom@...>
Date: 2008-01-28T04:09:58+09:00
Subject: Re: Making Change (#154)

> Here is my solution. It's ruby19 only.

In order to make it pass all of phrogz test cases, this line has to be
inserted right after the def make_change() line:

    return nil if coins.empty? or !amount.is_a?(Integer)

regards,
Thomas.