nested functions

[bimal]

how do u access an instance variable of a class from inside a nested function. for example,

function HelloClass () {
this.x = "HELLO";
}

HelloClass.prototype.update()
{
hXML = new XML();
hXML.onLoad = function(success)
{
if(success)
{
trace( /*this.x : how do i put an instance variable in here */ + this.toString());
}
else
{
//error
}
}
hXML.load("hello.xml");
}

[Jesse]

I'm not sure exactly what you mean. If you're trying to access a Class level variable from an instance of that Class:
function Foo() {
this.msg = "I am not a crook";
}
Foo.prototype.bar = function() {
trace(this.msg);
};
myFoo = new Foo();
myFoo.bar();

[bimal]

i understand that...
however is it possible for a nested function inside a class method to access a class variable?
or is the scope of the nested function is limited to the class method it is defined in?
thanks

[Jesse]

Hmm I see your point. For the moment I cna't get it working either but one thing to consider is that in order to be able to acces it you need to define your XMLM element as a child of the instance of the class you're using, otherwise the hXML object will end up on the _root level. This code still doesn'tw ork but might help you a bit:
function HelloClass() {
this.x = "HELLO";
}
HelloClass.prototype = Object.prototype
HelloClass.prototype.myupdate = function() {
this.hXML = new XML();
this.hXML.onLoad = function(success) {
if (success) {
trace(this._parent);
} else {
//error
}
};
this.hXML.load('mytest.xml');
};
myObject = new HelloClass();
myObject.myupdate();

[i++]

hi guys,

the XML object seems not to have a reference to its _parent, so you need to attach it yourself.
i named the reference to the parent '_parent'.
maybe it's better to give it another name, that is no keyword in AS:


function HelloClass() {
this.x = " HELLO ";
}
//
HelloClass.prototype.myupdate = function() {
// works with 'normal' functions
this.a = function() {
trace(this.x);
};
this.a();
// special case XML, got no _parent on default, needs to be attached 'by hand'
this.hXML = new XML();
this.hXML._parent = this; // maybe better to use another property name than '_parent'
this.hXML.onLoad = function(success) {
if (success) {
trace(this._parent.x);
}
else {
//error
}
};
this.hXML.load('test.xml');
};
myObject = new HelloClass();
myObject.myupdate();


hope it helps.

i++

[bimal]

good one there... thanks a lot... tht helps

[Jesse]

Great work i++. Thx.