This produces the compilation warning
1102: null used where a int value was expected.
I'm surprised that it doesn't produce a compilation error, and I'll ask the AS3
folks about that.
Gordon Smith
Adobe Flex SDK Team
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Tracy
Spratt
Sent: Friday, November 14, 2008 5:38 PM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] Re: Calling functions with optional parameters
If you pass a null value to an optional parameter, the function uses the
default values defined in the declaration.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="absolute">
<mx:Script><![CDATA[
import mx.controls.Alert;
import mx.core.Application;
public var app:* = null;
/** */
private function doTest():void
{
funcTest(null,null,"bar");
}//
private function funcTest(param1:int=0, param2:int=1,param3:String='foo'):void
{
Alert.show("param1=" + param1 + " param2=" + param2 + " param3=" + param3)
}//funcTest
]]></mx:Script>
<mx:Button label="test" click="doTest()" />
</mx:Application>
Tracy
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Amy
Sent: Friday, November 14, 2008 5:02 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Calling functions with optional parameters
--- In flexcoders@yahoogroups.com<mailto:flexcoders%40yahoogroups.com>, "Tracy
Spratt" <[EMAIL PROTECTED]> wrote:
>
> What if you explicitly passed null?
>
> theFunction(null,null,'bar');
The defaults aren't always null, and MPO is that the developer
shouldn't need to know what the appropriate default is to make the
default behavior. I feel like I'm really sure that I've seen places in
the framework code where functions are called this way, but I'm not
sure how to search in there to get verification.
It would be really, really nice if the docs were detailed enough that I
could get a good sense of whether I'm barking up the wrong tree (of
course the docs are wrong or misleading a good percentage of the time,
so detail is no guarantee) ;-).
Thanks;
Amy
