Empty function arguments

[Spiff59]

I thought something like this is supposed to use the default for the second parameter?

$parm1 = "xxx"
$parm2 = ""
test($parm1, $parm2)

Func Test($p1 = "1111", $p2 = "2222")
    Msgbox(1,"",$p1 & @CRLF & $p2)
EndFunc

I find no way (anymore) to get the "2222" value assigned to $p2.

Something change lately?

typo

Edited May 23, 2010 by Spiff59

[Yoriz]

Dont pass anything as the second parameter and it will use your default, if you pass a second parameter it overwrites the default.

$parm1 = "xxx"
$parm2 = ""
test($parm1)

Func Test($p1 = "1111", $p2 = "2222")
    Msgbox(1,"",$p1 & @CRLF & $p2)
EndFunc

[GEOSoft]

Nothing has changed. It's always been like that and Yoriz gave you the correct way.

In trying to do what you are doing your function would have to contain something like

If NOT $p2 Then $p2 = "2222"

Edited May 23, 2010 by GEOSoft

[jchd]

You can as well use the Default parameter placeholder in the call part, but that requires the function tests it with If IsKeyword($p2) Then $p2 = '2222'. Many functions in the standard UDFs work this way. This allows you to explicitely pass a third effective parameter while leaving the second to the default value and, more importantly, not caring what the default value is.

[Spiff59]

It seems different...

I'm fighting my way through the Alzheimers...

I guess I'm just imagining the way I think it ought to behave.

So with a multi-parameter function, where you want to modify the default for just the 6th parament, you'd have to have coded the function to check for, and replace, empty strings (or "Default" or -1, etc) for each the proceeding arguments, or else force the user to provide the default values all the way out to the parm they want to override.

Not very convenient.

Thanks for refreshing my memory.

Edited May 23, 2010 by Spiff59

[jchd]

Null parameters, enumerated parameters and named parameters are not in the AutoIt v3 syntax.

_myFct(3, 'abc', , , 19)

_myFct(#2:'abc', #1:3, #5:19)

_myfct(handle=3, count=19, prefix='abc')

[BrettF]

Check out _LoginBox for an example. Link in the sig...

Cheers,

Brett