From: "Peña, Botp" <botp@...>
Date: 2002-12-11T09:56:34+09:00
Subject: Re: warnings -w

Hi sir Guy (aka ts [mailto:decoux@moulon.inra.fr]):

You expounded last Tuesday, December 10, 2002 8:12 PM:

> 
>  Float#to_i is the same than Float#truncate
> 
> pigeon% ruby -e 'p ((2.4/0.2).truncate)'
> 11
> pigeon% 
> 
> pigeon% ruby -e 'p ((2.4/0.2).floor)'
> 11
> pigeon% 
> 
> pigeon% ruby -e 'p ((2.4/0.2).ceil)'
> 12
> pigeon% 
> 
> pigeon% ruby -e 'p ((2.4/0.2).round)'
> 12
> pigeon% 

but
irb(main):002:0> p "test #{2.4/0.2}"
"test 12"
nil
irb(main):003:0> p 2.4/0.2
12
nil
irb(main):004:0> 2.4/0.2
12

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

Isn't it that #to_i and #truncate exhibit odd and therefore dangerous
behaviour?
As a nuby, how do I avoid such "errors"?

> Guy Decoux

kind regards,
-botp