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: Eric Geoffroy <email@hidden>
- Date: Mon, 01 Nov 2004 16:58:59 -0800
OK. Worked for two+ hours and can't figure out how to return from the
isWeekend(d) handler. I scoured the Neuberg book and I'm missing
something.
Do I want to return true or return d?
The error says: "No result was returned from some part of this
expression." Here's the handler. (It's okay to laugh. I'm not proud)
on isWeekend(d)
if ((weekday of d) as string) contains "Saturday" or "Sunday" then
return true
end if
end isWeekend
Thanks,
Eric
On Nov 1, 2004, at 10:51 AM, Adam K. Wuellner wrote:
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.
Eric Geoffroy
Media Producer
Peachpit Press
(510) 524-2178 x214
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Applescript-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden