I think there is a conceptual distinction between the runtime type of an
AS3 value and the compile-time type of a var or parameter that holds
such a value.
The 'is' operator works on values. A value like 5 'is' both an int, a
uint, and a Number because it is a legal value in the set of possible
values for each of these types.
But I would expect a var declared as
var u:uint;
to report itself via describeType() as a uint, just like int and Number
do. It seems like a bug that it doesn't.
Gordon Smith
Adobe Flex SDK Team
________________________________
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Paul Whitelock
Sent: Thursday, May 15, 2008 3:59 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: How to tell if variable is an int, uint, or a
Number?
Thanks for the suggestion, but it still considers an int to be a uint
if the int is positive.
--- In flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
, Sherif Abdou <[EMAIL PROTECTED]> wrote:
>
> try using a dictionary instead of object
>
>
> ----- Original Message ----
> From: Paul Whitelock <[EMAIL PROTECTED]>
> To: flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
> Sent: Thursday, May 15, 2008 4:11:19 PM
> Subject: [flexcoders] Re: How to tell if variable is an int, uint,
or a Number?
>
>
> Well, it turns out that doesn't work either if the int is positive. If
> an int is positive all of the follow tests return true:
>
> var testInt:int = 5;
> var obj:Object = testInt;
>
> obj is int -> true
> obj is uint -> true
> obj is Number -> true
>
> Sooooo, I'm back to assuming there is no way to tell an int from a
uint.
>
>
> --- In [EMAIL PROTECTED] ups.com, "Paul Whitelock" <paul@> wrote:
> >
> > I found another way that seems to work (not sure why though):
> >
> > var testUint:uint = 1;
> > var testInt:int = -1;
> > var testNumber:Number = 1.1;
> >
> > var obj:Object = testUint;
> >
> > trace ("uint: " + (obj is uint && obj is int));
> > trace ("int: " + (obj is int && !(obj is uint)));
> > trace ("Number: " + ((obj is Number) && !(obj is int) && !(obj is
> uint)));
> >
> > Output:
> > uint: true
> > int: false
> > Number: false
> >
> > obj = testInt;
> >
> > trace ("uint: " + (obj is uint && obj is int));
> > trace ("int: " + (obj is int && !(obj is uint)));
> > trace ("Number: " + ((obj is Number) && !(obj is int) && !(obj is
> uint)));
> >
> > Output:
> >
> > uint: false
> > int: true
> > Number: false
> >
> > obj = testNumber;
> >
> > trace ("uint: " + (obj is uint && obj is int));
> > trace ("int: " + (obj is int && !(obj is uint)));
> > trace ("Number: " + ((obj is Number) && !(obj is int) && !(obj is
> uint)));
> >
> > Output:
> > uint: false
> > int: false
> > Number: true
> >
> >
> > --- In [EMAIL PROTECTED] ups.com, "Paul Whitelock" <paul@> wrote:
> > >
> > > Thanks! That did help, but it doesn't seem to work for a uint.
Here's
> > > my test code:
> > >
> > > var testUint:uint = 1;
> > > var testInt:int = -1;
> > > var testNumber:Number = 1.1;
> > > var testString:String = "test";
> > > var testDate:Date = new Date();
> > > var testArray:Array = new Array();
> > >
> > > var test:Array = [testUint, testInt, testNumber, testString,
testDate,
> > > testArray];
> > >
> > > for (var i:uint = 0; i < test.length; i++) {
> > > var typeInfo:String = describeType( test[i]). @name.toString( );
> > > trace(typeInfo) ;
> > > }
> > >
> > > And here's the output:
> > >
> > > int
> > > int
> > > Number
> > > String
> > > Date
> > > Array
> > >
> > > I'm guessing there's no way to identify a uint -- is that correct?
> > >
> > >
> > > --- In [EMAIL PROTECTED] ups.com, "Alex Harui" <aharui@> wrote:
> > > >
> > > > There is code that might help in
> > > > DataGrid.as: itemEditorItemEd itEndHandler
> > > >
> > > > ____________ _________ _________ __
> > > >
> > > > From: [EMAIL PROTECTED] ups.com
> > [mailto:[EMAIL PROTECTED] ups.com] On
> > > > Behalf Of Paul Whitelock
> > > > Sent: Thursday, May 15, 2008 12:31 PM
> > > > To: [EMAIL PROTECTED] ups.com
> > > > Subject: [flexcoders] How to tell if variable is an int, uint,
or a
> > > > Number?
> > > >
> > > >
> > > >
> > > > I have a situation where an untyped variable is passed in a
method
> > > > call and I need to determine the data type for the variable. My
> first
> > > > thought was to use typeof, but typeof returns "number" for an
int,
> > > > uint, or a Number. The operator "is" will not work on
primitives.
> > > >
> > > > Is there any way to determine the data type of an untyped
primitive
> > > > object?
> > > >
> > >
> >
>
