From: ara.t.howard@...
Date: 2006-09-06T09:53:16+09:00
Subject: Re: [ANN] timeunits-0.0.0

On Wed, 6 Sep 2006, Logan Capaldo wrote:

> I'm not exactly sure what delta.days means in this case, but rails does the 
> following with your example:

it's the difference (delta) in days.

>
> % script/console
> Loading development environment.
>>> a = Time.now
> => Tue Sep 05 19:50:11 -0400 2006
>>> b = a + 42.seconds
> => Tue Sep 05 19:50:53 -0400 2006
>>> delta = b - a
> => 42.0
>>> p delta.days
> 3628800.0
> => nil

right.  that is totally wrong.  the difference is only 42 seconds, therefor it
should be a fractional day.  eg.

     harp:~ > cat a.rb
     require 'yaml'
     require 'rubygems'
     require 'timeunits'

     a = Time.now.utc
     b = a + 42.seconds

     delta = b - a

     y 'delta.decades' => delta.decades
     y 'delta.years' => delta.years
     y 'delta.months' => delta.months
     y 'delta.days' => delta.days
     y 'delta.minutes' => delta.minutes
     y 'delta.seconds' => delta.seconds



     harp:~ > ruby a.rb
     delta.decades: 1.44675925925926e-07
     delta.years: 1.44675925925926e-06
     delta.months: 1.73611111111111e-05
     delta.days: 0.000486111111111111
     delta.minutes: 0.7
     delta.seconds: 42.0


the src is extremely short - read it for details. hopefully though, this
example show the difference.

-a
-- 
what science finds to be nonexistent, we must accept as nonexistent; but what
science merely does not find is a completely different matter... it is quite
clear that there are many, many mysterious things.
- h.h. the 14th dalai lama