From: Mark Hubbart <discord@...>
Date: 2004-03-05T03:59:47+09:00
Subject: Re: dynamic assignment of instance variables


On Mar 4, 2004, at 5:04 AM, Robert Klemme wrote:

>
> "Charles Comstock" <cc1@cec.wustl.edu> schrieb im Newsbeitrag
> news:c278e5$c4g$1@newsreader.wustl.edu...
>
>> Hey you know you could stuff prime? as a method in Integer as well.
>> Just run a miller-rabin primality test.  I'll see if I can't cook up
>> some code for that and send it your way, it might be another 
>> interesting
>> extension to have.
>
> IMHO it's better to have a PrimeTester class that does the checking
> because for efficiency reasons I'd want to store detected prime numbers
> somewhere.  Just my 0.02 EUR.

Why not store it in the number itself?

 >> 23.instance_eval{@prime = true}
=> true
 >> 24.instance_eval{@prime = false}
=> false
 >> 23.instance_eval{@prime}
=> true
 >> 24.instance_eval{@prime}
=> false

Or were you meaning persistant storage, so that it would be available 
to other interpreters?

--Mark