From: Jamis Buck <jgb3@...>
Date: 2004-05-13T02:26:21+09:00
Subject: Re: Major Addition Bug?

Sean O'Dell wrote:
> On Wednesday 12 May 2004 09:53, ts wrote:
> 
>>>>>>>"S" == Sean O'Dell <sean@celsoft.com> writes:
>>
>>S> raise "false" if ((625.91 + 900.00 + 22.00) != 1547.91)
>>
>> Well, this is well known
> 
> 
> Well known?  I had no idea this bug existed until I wrote a line of code that 
> double-checked the arithmetic from a different app.  I have code all over 
> doing simple arithmetic like this.  Ruby can't add 3 simple numbers?  I don't 
> mean to be disproportionately negative, but that shakes my faith more than a 
> little.  It's just simple arithmetic.  How old is this bug?  When is it 
> getting fixed?
> 
> 	Sean O'Dell
> 
> .
> 

For what its worth, it appears (on my box, at least) that perl and 
python both give the same result. It is not a Ruby bug, but rather a 
problem with floating point round off.

-- 
Jamis Buck
jgb3@email.byu.edu
http://www.jamisbuck.org/jamis

ruby -h | ruby -e 
'a=[];readlines.join.scan(/-(.)\[e|Kk(\S*)|le.l(..)e|#!(\S*)/) {|r| a << 
r.compact.first };puts "\n>#{a.join(%q/ /)}<\n\n"'