I could be wrong, but AFAIK a FUNCTION is just a SUBROUTINE with some syntax magic (the DEFFUN statement) that lets you reference it in an expression rather than using the CALL statement. A function call has the same overhead as a subroutine call. You can't put local functions inside of your program and get local variables that way (although you could do that on the old ADDS MENTOR systems. I wish universe had included that functionality) The return from the function can be multi-valued, and you can change the value of parameters just like in a subroutine call.
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Wendy Smoak > Sent: Wednesday, June 22, 2005 2:47 PM > To: u2-users@listserver.u2ug.org > Subject: [U2] Custom Functions > > > I was just looking at the documentation for FUNCTION after > hearing a couple of people make reference to custom > functions. How did we not know about this?! (Has this > always been possible, or was it added > recently?) > > We consider subroutines fairly "expensive" in terms of system > resources, and tend to just use GOSUB within most programs. > But coming from the Java/OO world, the global variables are > *killing* me. And I'm partial to the nested parenthesis > notation as well. > > Does anyone have any best practice advice or gotchas to > impart? We have a need to find the "Ultimate Parent" in a > tree of corporation/parent/subsidiary relationships. > > In particular, I might find a case where there is more than > one "Ultimate Parent" and I need to signify an error. Do I > return -1, or set @SYSTEM.RETURN.CODE to a positive number? > > Thanks, > -- > Wendy Smoak > Applications Systems Analyst, Sr. > Arizona State University, PA, IRM > ------- > u2-users mailing list > u2-users@listserver.u2ug.org > To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
