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

Tue, 23 May 2006 15:15:05 -0700

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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