[CODE] JPDurationToDecimalNumberFormatter

FROM : Jamie Phelps
DATE : Tue Oct 14 15:27:09 2008

Hi, all. I have received so much help from this list that I wanted to 
share a small something back. It is a subclass of NSNumberFormatter to 
format time duration. It works for me but I'm sure it could be 
improved as well. You can download it from my iDisk public folder (http://idisk.mac.com/jrphelps-Public
  from the web) under Code/JPDurationToDecimalNumberFormatter.zip

I wrote this class for a calculator application for computing selling 
prices for products based on time required and an hourly rate. It 
could also be used for a billing application or anywhere else time 
formatting is desirable.

It handles times in the format [dd:]hh:mm meaning that if there are 
two components, it reads as hours and minutes but if you add a third 
component it reads as days, hours, and minutes. It then converts this 
value into a decimal number representing the number of hours. So, 
12:15 would be 12.25, 1:13:45 would be 37.75. If the user enters 
anything other than a colon separated string, it falls back to super. 
It can also handle input as a decimal and then convert it to time 
formatted string so 8.5 can be entered and display as 8:30.

Anyway, I hope someone finds it useful and I welcome your thoughts, 
comments, and improvements. I have licensed it as a Creative Commons 
Attribution-Share Alike 3.0 United States license. If this is too 
restrictive, tell me. What I want is the "Don't Be a Jerk" and "Tell 
Me If You Use It" license. :)

Cheers,
Jamie