RE: [flexcoders] Re: ? Variables of type Object can not be undefined. undefined will be type coerced to Object before comparison.

Tue, 23 May 2006 15:27:35 -0700

I see that doc.  I have been working off the Migration Guide pdf, which
seems a bit out of date.

Yes, Object was the way I decided to go.  Definitely cleaner than
creating flag variables.

I wonder if I will need to cast the object to a boolean to compare?

Tracy

-----Original Message-----
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Tim Hoff
Sent: Tuesday, May 23, 2006 6:10 PM
To: [email protected]
Subject: [flexcoders] Re: ? Variables of type Object can not be
undefined. undefined will be type coerced to Object before comparison.

Tracy,

Good reference under Special Types.  But, wouldn't this work in your
situation?

var bValid:Object;
if (bValid == null)

Tim

--- In [email protected], "Darren Houle" <[EMAIL PROTECTED]> wrote:
>
> In the API docs it says about "undefined"
>
> public const undefined:*
>
> A special value that applies to untyped variables or dynamic
object
> properties that have not been initialized. The value undefined
applies to
> untyped variables that have not been initialized. In ActionScript
3.0 only
> variables that are untyped can hold the value undefined, which is
not true
> in ActionScript 1.0 and ActionScript 2.0. For example, both of the
following
> variables are undefined because they are untyped and unitialized:
>
> var foo;
> var bar:*;
>
> So I just assumed "undefined" was only for use with untyped and/or
> unitialized dynamic vars.  There's nothing here about typing as
Object. 
> Maybe the docs have conflicting information in different places
since the
> recent change to undefined???
>
> Darren
>
>
>
>
> >From: "Tracy Spratt" <[EMAIL PROTECTED]>
> >Reply-To: [email protected]
> >To: <[email protected]>
> >Subject: [flexcoders] ? Variables of type Object can not be
undefined. 
> >undefined will be type coerced to Object before comparison.
> >Date: Tue, 23 May 2006 17:35:42 -0400
> >
> >Why is the compiler is giving me this error when I do a
comparison:
> >var bValid:Object;
> >if (bValid == undefined) ...
> >
> >Even though the docs state:
> >In ActionScript 3.0, undefined is only for use with type Object.
> >
> >The doc is the latest Migration Guide pdf.
> >
> >Tracy
>







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