Re: [Flashcoders] Type Coercion Failed: Odd behavior.

Paul Chang Thu, 21 Jun 2007 10:45:34 -0700

Thanks for this reference. I performed a simple test and it works.


However, for my particular example, I receive an error.

var liquidObject:LiquidObject = parent.getChildAt(i) as LiquidObject;

assigns null to liquidObject.

The only thing that has worked for me so far is:

if (parent.getChildAt(i) is LiquidObject) {
        trace(LiquidObject(parent.getChildAt(i)));
}

My only explanation is that I'm attempting to perform this castWITHIN the LiquidObject class itself.

I currently have the stated workaround, but any further insightswould be of interest to me.


Best,
Paul


On Jun 21, 2007, at 6:19 AM, Muzak wrote:

You should always use the new "as" operator.

This article might help:
http://www.darronschall.com/weblog/archives/000211.cfm

regards,
Muzak


----- Original Message -----
From: "Amir T Rocker" <[EMAIL PROTECTED]>
To: <flashcoders@chattyfig.figleaf.com>
Sent: Thursday, June 21, 2007 11:39 AM
Subject: Re: [Flashcoders] Type Coercion Failed: Odd behavior.

Hi,

i experienced the same behaviour using this type of cast

var somVar = Caster( Castee );

sometimes it works and sometimes it doesnt ...

I tried to use the 'as' operator and that suddenly works whereabove coed failed.


var someVar = list.getItemAt( i ) as TypeToCast;

I hope maybe that works for you too. I havent figured the castingrules quite yet. So if anybody can explain it

its really appreciated :)

Best of luck
Amir

Am 04:07 AM 6/21/2007 schrieben Sie:

Hello,

I've created a custom class:

LiquidObject extends Sprite

I then create several instances of LiquidObject and add them as
children to a parent Sprite.

If I cycle through and trace the children as such:

for (var i:int=0;i<parent.numChildren;i++) {
        trace(parent.getChildAt(i));
}

Each trace shows the correct type of object:

[object LiquidObject]

When I tried to access a property specific to LiquidObject
(LiquidObject.selected) it does not recognize this to be a property
because it thinks it's dealing with a general Sprite. So, I attempt
to coerce to type LiquidObject as such:

for (var i:int=0;i<parent.numChildren;i++) {
        trace(LiquidObject(parent.getChildAt(i)).selected);
}

Unfortunately, I receive an error stating that I can't coerce type
Sprite to LiquidObject. I would think that this would be allowed

since (a) LiquidObject extends Sprite and (b) parent.getChildAt(i) is

already presenting a type LiquidObject in the trace.

Any suggestions would be appreciated.

Thanks in advance.
Paul



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Re: [Flashcoders] Type Coercion Failed: Odd behavior.

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