Re: Day of the week

David Morris wrote:
> 
> MB,
> 
> This may very well be the perfect RPG date routine, but how do you know
> this works?  Will it have problems if converted to RPGIV?  Over the years I
> have come across at least three variations of this routine.  I usually was
> made aware of their existence when they failed or the code that used them
> failed.  I have found bugs in some of them.  For example, DBASE used a
> similar routine with 30.57 as the multiplier.  News/400 published a utility 
>in the
> early 90's that used 30.6001.  You have used 30.6.  I would opt for the RPGIV
> solution because I believe the built-in date routines are tested and work.

I'll grant you that it's not the "perfect" routine, but it is based on
some
pretty sound math and this routine in one form or another has been
around a
lot longer than RPG.. I would use the RPGIV myself, but remember, a LOT
of
code running is NOT RPGIV and this routine goes back to the S/3 as best
I 
can remember... I have NEVER seen the original routine fail and I have
tested
it a good number of times... I have seen it used incorrectly but
bugs...NO..

You need to remember..date math used to be a real pain in the whazooooo
and 
programmers are always looking for that magic that works...
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