From: Stefano Taschini <taschini.mlist@...>
Date: 2006-04-27T22:30:56+09:00
Subject: Re: Day number delta

You might want to require mathn as well:

require 'date'
require 'mathn'

Date.new(2006,4,28) - Date.new(2005,3,17)
    #=> 407

Ciao,
Stefano


On 27/04/06, Kirk Haines <khaines@enigo.com> wrote:
> On Thursday 27 April 2006 6:30 am, Lindsay Boyd wrote:
> > How can I calculate the number of days between two Date objects?. This
> > is easy enough with Time objects using the epoch seconds method tv_sec.
> > Is there something similar for Dates?
>
> delta = a - b
>
> Just subtract one from the other.
>
> irb(main):001:0> require 'date'
> => true
> irb(main):002:0> a = Date.new(2006,4,28)
> => #<Date: 4907707/2,0,2299161>
> irb(main):003:0> b = Date.new(2005,3,17)
> => #<Date: 4906893/2,0,2299161>
> irb(main):004:0> c = a - b
> => Rational(407, 1)
> irb(main):005:0> c.to_i
> => 407
>
>
> Kirk Haines
>
>