From: "Peña, Botp" <botp@...>
Date: 2002-12-11T10:25:29+09:00
Subject: Re: Proper Type for Dollar Amount

Hi Mark (aka Mark Probert [mailto:probertm@nortelnetworks.com]):

You enlightened last Wednesday, December 11, 2002 2:46 AM:
> 
> My own experience (based on developing real-time trading 
> systems for some merchant banks), is that the best solution 
> is to use scaled integers, to 100th of a cent.  So, $154.34 
> --> 1543400.  You then get very fast operations (they are all 
> integer operations) and, in general, well with +- 4 billion.  
> Ruby, with BigInt makes it trivial.

Hmmm.. very clever/insightful, sir Mark. I'm putting your tip on my code
bank ;-)

C:\family\ruby>type a1.rb
def t
        (2.4)/(0.2)
end

x = t
p x
p x.truncate

C:\family\ruby>ruby a1.rb
12
11


C:\family\ruby>type a1.rb
def t
        (2.4*100)/(0.2*100)
end

x = t
p x
p x.truncate

C:\family\ruby>ruby a1.rb
12.0
12

I do not get truncation problems :-)

> Regards,
> -mark.

Kind regards,
-botp