From: Fukumoto Atsushi <fukumoto@...>
Date: 2003-03-26T16:30:27+09:00
Subject: Re: Newbie question: 9/5=1 ?

Paul Brannan <pbrannan@atdesk.com> wrote:
>> On Sat, Mar 22, 2003 at 04:37:40AM +0900, Joel VanderWerf wrote:
>> > I guess extension writers should not rely on 1/2 == 0 .
>> 
>> Do you think this is reasonable?
>> 
>> What method should I call if I want integer division?

Supposedly, you have to use Kernel.Integer, which uses native
conversion if obj is builtin numeric object, otherwise it calls
obj.to_int (if obj responds to to_int, in Ruby 1.7 or later) or
obj.to_i (if obj does not respond to to_int, or Ruby version is older
than 1.7).  For example, Rational class has Rational#to_i, which hides
the call of Integer#div.


						FUKUMOTO Atsushi
						fukumoto@imasy.or.jp