[AccessD] Checking for Optional Parameters
jimdettman at verizon.net
Wed Jan 25 06:03:14 CST 2023
I do not.
I like running down the list of arguments in order as I type and follow the
intelligence. If I don't like the order for some reason, I do a Find &
Replace and change it.
I typically do not use a lot of optional parameters either. I find that if
I'm using a procedure so many ways that it requires more than a few optional
parameters, then I probably need another procedure. I find having a lot of
optional arguments makes a procedure more complex to write and understand,
and more difficult to test and debug.
It's the same concept as normalization with records in a RDBMs. If the
records in a table are different "shapes" (you leave some fields null in
some records because they don't apply at all rather simply not knowing the
value), then you need to breakout some of the records into another table.
Likewise with a procedure, if you are trying to do twenty different things
with it, then you need to ask yourself if you shouldn't have twenty
And of course, I'm talking about VBA here, which doesn't allow overloading
From: AccessD On Behalf Of Arthur Fuller
Sent: Tuesday, January 24, 2023 9:00 PM
To: Access Developers discussion and problem solving
<accessd at databaseadvisors.com>
Subject: Re: [AccessD] Checking for Optional Parameters
Hi John et. al.,
Actually I knew that already. What I was trying to ask is whether you folks
use them in practice, or not.
On Tue, Jan 24, 2023 at 5:21 PM John Colby <jwcolby at gmail.com> wrote:
> Named params allow you to pass them in any order because you now use the
> syntax "ParamA - 1234", IOW you can actually tell the function which
> you are passing in what order by specifying the name.
> On Tue, Jan 24, 2023 at 7:47 AM Arthur Fuller <fuller.artful at gmail.com>
> > I keep forgetting which check to use to determine whether or not an
> > optional parameter was passed to a function.
> > <code>
> > Function myFunc( Optional d as Date ) as <whatever>
> > 'is it:
> > If IsMissing( d) or
> > If IsNull(d) or ?
> > </code>
> > Side question: As a matter of coding style, do you use named parameters
> > your own functions (i.e. as in, say, a call to MsgBox, which gives you
> > prompt that walks you through the syntax as you type)?
> > --
> > Arthur
> > --
> > AccessD mailing list
> > AccessD at databaseadvisors.com
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> > Website: http://www.databaseadvisors.com
> John W. Colby
> Colby Consulting
> AccessD mailing list
> AccessD at databaseadvisors.com
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