On [Sat, 26.01.2008 00:50], Ruby Quiz wrote:
> In "Practical Ruby Projects," the author includes a couple of chapters involving
> coin simulations.  These simulators are used to explore the possibilities of
> replacing a certain coin or adding a new coin.

Are there any advanced combinations of change/array of coins which are likely to fail 
on some implementations?
-- 
Dominik Honnef