Re: Best practices- nested loops or handlers or both
Re: Best practices- nested loops or handlers or both
- Subject: Re: Best practices- nested loops or handlers or both
- From: "Adam K. Wuellner" <email@hidden>
- Date: Mon, 1 Nov 2004 12:51:46 -0600
On Nov 1, 2004, at 12:03 PM, Eric Geoffroy wrote:
d is date in list
Loop 1 tests d and if it's a weekend, bumps it to next day.
Loop 2 tests d and if it's a holiday, bumps it to next day.
Now those two loops need to be nested in case loop 2 moves d to a
weekend.
... and, obviously, it doesn't stop there. If you start on
Thanksgiving, for example, you'll need loop 2 twice and loop 1 twice:
(Thursday -loop 2-> Friday -loop 2-> Saturday -loop 1-> Sunday -loop
1-> Monday)
What you want, probably, is a recursive handler that test for both
weekend-ness and holiday-ness, increments the date if either are true,
and calls itself again to see if it should continue processing.
So, say you've got good isWeekend(d) and isHoliday(d) handlers, each
returning true or false. Then you can create a recursive handler to
increment the 'd' parameter until both tests are false. Consider this
pseudo code:
on getNextBusinessDay(d)
if isWeekend(d) or isHoliday(d) then
d = d + 1
getNextBusinessDay(d)
end if
return d
end getNextBusinessDay
If d is either a holiday or a weekend, then it gets bumped, and we call
the handler again. If it's still either holiday or weekend, then it
gets bumped, and we call the handler again... If at any point
(iteration) d is not a holiday or weekend, the if...end if block is
passed over and the value d is returned from the handler.
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