From: Joel VanderWerf <vjoel@...>
Date: 2004-11-14T16:20:18+09:00
Subject: Re: [ANN] Copland to Needle article on RubyGarden (LONG)

Jamis Buck wrote:
> Joel VanderWerf wrote:
> 
>> In this case there are just a few kinds, but what if the printer 
>> arguments have more possible variation? What if, in addition to kind, 
>> there is an integer argument (a port number, say)?
> 
> 
> Well... you'd just use an array for the hash key, right? Or am I 
> misunderstanding your question?

Your suggestion, if I understood correctly, was to enforce a multiton 
service model of printers by defining a fixed number of singleton 
services, one for each printer. Now suppose specifying a printer 
requires not just a kind, but a kind and a port number. In that case, 
there are a lot of singletons...

That seems to be a good reason to find a way to express the multiton 
model explicitly.