From: "Mark J. Reed" <markjreed@...>
Date: 2003-12-05T08:27:05+09:00
Subject: Re: Swatch's internet time in Ruby [Code Inside]

Pablo Lorenzzoni  <spectra@debian.org> wrote:
> :         def bmt_hour
> :                 h = self.gmtime.hour + 1
> :                 return 0 if h == 24
> :                 return h
> :         end

The usual way of doing that is with modular arithmetic; in fact,
"clock math" is the usual example of modular arithmetic given in
school.  In Ruby it looks like this:

	def bmt_hour	
	    (self.gmtime.hour + 1) % 24
	end

> :         def beats
>  	    ((self.bmt_hour * 60 * 60) + (self.min * 60) + self.sec) / 86.4
> :         end             

Can't really improve upon that, although I like the appearance of
this formula a little better for some reason:

	def beats
	    (self.bmt_hour + (self.min + self.sec / 60) / 60) / 2.4
	end

-Mark