From: Mike Stok <mike@...>
Date: 2002-09-15T08:46:16+09:00
Subject: Re: Time#+ and usec

In article <8248e2a3.0209141306.7677f2d3@posting.google.com>,
Michael Witrant wrote:

> Hello,
> 
> The following results look buggy. I tried with Ruby 1.6.7 and 1.7.2.
> 
> (Time.at(0) + .1).usec # => 100000
> (Time.at(0) + .2).usec # => 200000
> (Time.at(0) + .3).usec # => 299999
> (Time.at(0) + .4).usec # => 400000

Smells like floating point arithmetic in action to me ... try

[0.1, 0.2, 0.3, 0.4, 0.5].each { |f|
  puts '%.20f' % f
}

And have a look at http://docs.sun.com/source/806-3568/ncg_goldberg.html

Hope this helps,

Mike

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