Sorry, it seems like such ancient history that I forgot...
ALL classes in AS2 / Flex 1.x were what we now call "dynamic". The
distinction between a dynamic class and a non-dynamic ("sealed") one --
as determined by the 'dynamic' keyword on a class declaration -- was
introduced in AS3 / Flex 2.
- Gordon
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Tracy Spratt
Sent: Wednesday, February 20, 2008 4:32 PM
To: [email protected]
Subject: RE: [flexcoders] dynamic function Names
Yes, bracket notation will almost always resolve an object reference.
Very powerful.
Regarding mx:Application, perhaps my terminology is incorrect.
I seem recall that the change to tight typing happened in AS3/FP8/Flex2.
And do remember that in a 1x app we coud do:
this["myvar"] = "myvalue"! ; //dynamically creating the variable 'myvar'
as a member of Application.
In fact, I was so sure of this that I actually cranked up FB 1.5, and
the Flex server (remember that?) and created this example:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml
<http://www.macromedia.com/2003/mxml> " initialize="initApp()">
<mx:Script><![CDATA[
function initApp() {
this["myvar"] = "myvalue"; //Dynamically create var
on application. NOT LEGAL IN AS 3!
}
function alertMyVar() {
alert(this["myvar"]);
}
]]></mx:Script>
<mx:Button label="Test" click="alertMyVar()"/>
</mx:Application>
This does work.
Of course this is so ancient, it is really irrelevant.
Tracy
From: [email protected] [mailto:[email protected]
<mailto:[email protected]> ] On Behalf Of Gordon Smith
Sent: Wednesday, February 20, 2008 4:25 PM
To: [email protected]
Subject: RE: [flexcoders] dynamic function Names
You can look up properties and methods by name with o[p] syntax even if
o isn't an instance of a dynamic class.
And I'm pretty sure that <mx:Application> wasn't a dynamic class in 1.x.
Gordon Smith
Adobe Flex SDK Team
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Tracy Spratt
Sent: Wednesday, February 20, 2008 12:49 PM
To: [email protected]
Subject: RE: [flexcoders] dynamic function Names
As long a "this" is a dynamic object. In 1.x, mx:Application was
dynamic, in 2+ it is not.
Tracy
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of joshua gatcke
Sent: Monday, February 18, 2008 4:51 PM
To: [email protected]
Subject: [flexcoders] dynamic function Names
Hi all, after much toil, I have learned that I can have dynamic
function names doing something like this:
var myFunctionName:String = 'foo';
this[myFunctionName]();
This is awesome! Just thought I would share, but you guys probably
already knew how to do that ;)
- joshua
