From: Reid Thompson <Reid.Thompson@...>
Date: 2007-03-15T01:33:32+09:00
Subject: Re: Calculating the age given DOB

On Wed, 2007-03-14 at 23:55 +0900, Deniz Dogan wrote:
> Hello, fellow rubyists.
> 
> I have a problem. I'm trying to write a simple program which calculates 
> the age of a person given the person's date of birth in an instance of a 
> Date class. I have no idea what is the best way to do this. I don't feel 
> like using any ugly "hacks" to do it, and I wonder if there is any good 
> (perhaps mathematical) algorithm out there to solve the problem.
> 
> --Deniz Dogan
> 
rthompso@jhereg:~$ irb
irb(main):001:0> require 'date'
=> true
irb(main):002:0>  bd = Date.new(1966, 1, 21)
=> #<Date: 4878293/2,0,2299161>
irb(main):003:0>  today = Date.new(2007,3,14)
=> #<Date: 4908347/2,0,2299161>
irb(main):004:0>  age = today.year - bd.year
=> 41