writing a UDF with default variables

[Mike Wilson]

I have read the docs of functions and search this board but haven't found how to do this. What/how do I write the script for a UDF to contain a default. For example, in the following, I want the time_open to default to 2 second if a value for the time_open is not declared. But hoe do I make it so when the UDF is called without the parameter, an error does not occur? Thanks...

FUNCTION example_script as C (message as C,[time_open as N])
ui_modeless_dlg_box("Greeting",<<%dlg%
{nocaption}{font=Arial,12,b}{background=yellow}
{lf};
{text=60message};
{lf};
%dlg%)

sleep(time_open)
ui_modeless_dlg_close("Greeting")

END FUNCTION

[Allen Klimeck]

Re: writing a UDF with default variables

FUNCTION example_script as C (message as C,time_open as N=2)

[Finian Lennon]

Re: writing a UDF with default variables

Change your function definition to be

FUNCTION example_script as C (message as C,time_open = 2)

[Ray in Capetown]

Re: writing a UDF with default variables

Maybe I don't read help all the way through, but I've never seen that Finian.
I just noticed, to give credit also, Allen made the same suggestion a couple of minutes before.
Thanks, great tip. You guys should answer more questions.

[Stan Mathews]

Re: writing a UDF with default variables

In this entry under Optional Parameters

http://wiki.alphasoftware.com/User+Defined+Functions

[Al Buchholz]

Re: writing a UDF with default variables

FUNCTION example_script as C (message as C,time_open as N=2)

Isn't it
time_open =2 as N

[Allen Klimeck]

Re: writing a UDF with default variables

Isn't it
time_open =2 as N

NO

[Al Buchholz]

Re: writing a UDF with default variables

NO

Actually it works both ways.. Been a long time, not sure how long it'll last...

I do hear you that that the docs say what they say..

[Allen Klimeck]

Re: writing a UDF with default variables

Actually it works both ways.. Been a long time, not sure how long it'll last...

I do hear you that that the docs say what they say..

I did know that it will work both ways. In fact you can leave off the "AS n" part (as Finian Lennon pointed out) & it will still work. But if you need type "A" you need the "AS a" part, I think that this started with V6 when they added the ablitity to give a variable an initial value when you DIM it as:

V5
dim var1 as c
var1 = "test"

V6
dim var1 as c = "test"

So it would follow that the docs are correct & they should clean up function declarations. How many funtionns will this break?

[Ray in Capetown]

Re: writing a UDF with default variables

In this entry under Optional Parameters

http://wiki.alphasoftware.com/User+Defined+Functions

I re-read, I have read this page - hey ! when did they put that there ?
obviously the significance didn't strike me at that time.

[Mike Wilson]

Re: writing a UDF with default variables

Thanks folks. I've got to get a better handle on this wiki. I type in "User Defined Function" and I don't get a hit. The "s" in Functions must be there. Very frustrating. Thanks again.

[MoGrace]

Re: writing a UDF with default variables

Hi Mike,
If you look at the links at the bottom of this page you will find where you asked this question in 2010! Did you know you can add folders to your subscription page so you can save old posts to find them again for future reference?