Also, I get the same problem when myVar is a gui. eg
<mx:TextArea id="myVar"/> in mx.core.Application.application.
Then, from another component i call
if(!("mx.core.Application.application.myVar" in
mx.core.Application.application))
{
mx.controls.Alert.show("myVar doesnt exist");
} //passes
Actually, that if test passes in the main mxml application file as
well. But if i loose the "mx.core.Application.application" its okay
again.
confused? i am.
--- In [email protected], "Gordon Smith" <[EMAIL PROTECTED]>
wrote:
>
> When I change
>
>
>
> private var myVar:Object;
>
>
>
> to
>
>
>
> public var myVar:Object;
>
>
>
> the alert doesn't come up, as expected. Changing it to protected
doesn't
> fix it.
>
>
>
> So apparently "in" only works on public -- not private or
protected --
> things, which I didn't know. I'll ask our AS3 designers whether
that's
> the intended behavior.
>
>
>
> - Gordon
>
>
>
>
>
> -----Original Message-----
> From: [email protected]
[mailto:[EMAIL PROTECTED] On
> Behalf Of bhaq1972
> Sent: Friday, April 07, 2006 2:47 AM
> To: [email protected]
> Subject: [flexcoders] Re: Testing if a variable exist?
>
>
>
> hi Gordon,
>
> one question please.
>
> how come the following code passes the if test even though myVar
>
> clearly exists?
>
>
>
>
>
> private var myVar:Object;
>
> private function test():void
>
> {
>
> myVar = new Object();
>
>
>
> if(!("myVar" in this))
>
> {
>
> Alert.show("passes");
>
> }
>
> }
>
>
>
> thanks
>
> bod
>
>
>
> --- In [email protected], "Gordon Smith" <gosmith@>
>
> wrote:
>
> >
>
> > if ("idName" in this)
>
> >
>
> > - Gordon
>
> >
>
> > -----Original Message-----
>
> > From: [email protected]
>
> [mailto:[EMAIL PROTECTED] On
>
> > Behalf Of alpharythms
>
> > Sent: Wednesday, April 05, 2006 3:19 PM
>
> > To: [email protected]
>
> > Subject: [flexcoders] Testing if a variable exist?
>
> >
>
> > I imagine this is something simple that I am missing but is
there a
>
> > way to test a variable to see if it exist.
>
> >
>
> > Specifically I have several components with IDs. So I can
access
>
> them
>
> > like this.idName or this["idName"].
>
> >
>
> > I need to way to know if this["idName"] is a valid variable.
I've
>
> > tried if(this[idName]==null) or undefined. The trouble is I get
a
>
> > runtime error as soon a this[idName] that doesn't exist comes up.
>
> >
>
> > Here is what I'm try do to. I've loading an XML document and
then
>
> > looping through the attributes in a node. If a
>
> > this[currentAttributeName] component exist then I bind it to the
>
> data
>
> > in the XML. If I come across an attribute that doesn't exist on
>
> the
>
> > Flex form than I just want to ignore it.
>
> >
>
> > Everything works great until I hit an attribute that doesn't
>
> exist.
>
> > So I just need a way to test for the existance of a component
with
>
> the
>
> > given ID name.
>
> >
>
> > Thanks,
>
> > Adam
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > --
>
> > Flexcoders Mailing List
>
> > FAQ:
>
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>
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>
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>
> > Yahoo! Groups Links
>
> >
>
>
>
>
>
>
>
>
>
>
>
>
>
> --
>
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>
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