Is this the answer to the age old question of 'Who's on first?' :)
-----Original Message-----
From: JesterXL [mailto:[EMAIL PROTECTED]
Sent: Monday, April 04, 2005 10:35 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Re: AS - adding dynamic properties to an object
A rundown of them all:
"Who's on here?"
-----------------
function showProps(o:Object):Void
{
for(var p in o)
{
trace("-------------");
trace(p + ": " + o[p]);
trace("typeof: " + typeof(o[p]));
trace("is a String: " + (o[p] instanceof String));
trace("is a Number: " + (o[p] instanceof Number));
trace("is a Array: " + (o[p] instanceof Array));
trace("is a Boolean: " + (o[p] instanceof Boolean));
trace("is a Date: " + (o[p] instanceof Date));
}
}
Obviously there are more data types.
You know the type (not recommended):
var val:String = o[p];
You coerce the type (recommended, but expect weird results):
var val:MyClass = MyClass(o[p]);
Keep in mind, the above works differently since some intrinsic datatypes
have special constructors; String(something) actually converts it to a
String, and Date's overloaded with a few different ways of making them.
...obviously, interfaces are typically the best way, since you can typecast
'em (I think, I did it with a CollectionItr):
var myA:Iterator = Interator(reallyARecordSet);
Or something to that effect.
----- Original Message -----
From: "Ben Elmore" <[EMAIL PROTECTED]>
To: <flexcoders@yahoogroups.com>
Sent: Monday, April 04, 2005 10:15 PM
Subject: RE: [flexcoders] Re: AS - adding dynamic properties to an object
A quick way to do it (ugly admittedly) is to use the 'instanceof' or
'typeof' operator.
if ( obj[propertyName] instanceof Date )
You might need to cast into number or date before you check the instance of
to see if it is valid.
-----Original Message-----
From: viraf_bankwalla [mailto:[EMAIL PROTECTED]
Sent: Monday, April 04, 2005 10:06 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: AS - adding dynamic properties to an object
Thanks - the example below would have worked if I had knowledge of the
property name when I wrote the code. This is not the case (the property
name is retrieved with a service request).
The solution that I found was to use the associative array syntax -
obj[propertyName] = yy;
Now the next question is that how do I specify that "propertyName" is of a
given type - say Date or Number.
Thanks.
--- In flexcoders@yahoogroups.com, Manish Jethani <[EMAIL PROTECTED]>
wrote:
> On Apr 5, 2005 1:08 AM, viraf_bankwalla <[EMAIL PROTECTED]> wrote:
>
> > How do I add dynamic properties to an obect ? These properties are
> > received over the HTTPService request.
>
> If you have an instance of a dynamic class, you can just stick them
> onto the object.
>
> var o:Object = new Object(); // dynamic object
> o.newProperty = "default value"; // stick a new property onto it
>
> Pretty much it.
>
> Manish
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