don't forget that sub 'return' values can be used inline using SUBR() :
IF SUBR("mysub",var1,var2,var3) THEN
* process errors
END
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Claus Derlien
Sent: Friday, May 20, 2005 03:31 AM
To: [email protected]
Subject: RE: [U2] Include Vs Call - Software Maintenance
The nice thing about functions is that you can return the error code of your
function
giving you the following syntax
IF myfunc(var1,var2,var3) THEN
* process errors
END
which i prefer to
CALL mysub(var1,var2,var3,error)
IF error THEN
* process errors
END
and beware that parameters passed through to your function is still
passed 'by reference' like in a subroutine, and not 'by value', so your
function is
able to alter all passed parameters
if you want to restrict your function from altering the passed parameters
you still need to enclose them in ()
best regards from 'grey rainy' Denmark
Jeff wrote this :
> Functionally speaking, why would I use a function which can
> return a single
> argument when I can use a subroutine which can return 1 or
> more? In terms of
> code reuse, there are often times when I've written a
> subroutine that returns
> a single argument, only to go back months later and add more
> return args. A
> subroutine would still need to be changed, but I feel the
> perceived amount of
> work I have to do is less.
>
> Perhaps it's just my perception...
>
> --
> Jeff Butera, Ph.D.
Frie Funktionfrer - faglig organisation og tvfrfaglig a-kasse - www.f-f.dk
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