Markus Fritsche <Fritsche.Markus at gmx.net> wrote:
> I need this for my "working time" calculator. Like
> Begin: 8:00
> Time to work: 7:31
> Pause: 0:30
> "Gleitzeit" -5:00
> End: 16:00
> 

ANSI Smalltalk has DateAndTime and it has Duration, which fit the
problem very naturally.  You can subtract two DateAndTime's to get a
duration, and you can add a bunch of durations together to get their
sum.

So, one option is to dig up the ANSI extensions for Squeak and use them.

-Lex