Hi,
> function Contained ()
> {
> var self=this;
> self.var1=1;
> self.var2=2;
> self.method1=function ()
> {
> };
> }
>
> function Container ()
> {
> var self=this;
> self.varA = 'a';
> self.varB = 'b';
> self.containedObj = new Contained;
> }
>
> var foo = new Container;
>
> Now suppose I want to access variables of Container from within
> Contained, for example I might want method1 to return the value of
> varA in Container. How would I go about doing this?
As in all OO-Languages you don't. Examples in other languages:
Java
----
class Conainted {
public int var1;
public int var2;
public Contained() { var1 = 1; var2 = 2; }
public void method1() {...}
}
class Container {
public String varA;
public String varB;
public Container() { varA = 'a'; varB = 'b'; }
public Contained containedObj;
}
(new Container()).containedObj.method1();
//How could method1 ever access varA?
----
C++
----
class Contained {
public:
int var1, var2
Contained();
void method1();
};
class Container {
public:
std::string varA;
std::string varB;
Container();
Contained containedObj;
};
Contained::Contained(): var1(1), var2(2) {};
void Contained::method1() {...}
Container::Container(): varA("a"), varB("B") {};
(new Container()).containedObj.method1();
//How could method1 ever access varA?
----
You may give the container as a parameter to method1:
Java:
----
class Conainted {
...
public void method1(Container c) {
System.out.println(c.varA);
...
}
}
----
C++:
----
class Contained {
public:
...
void method1(Container* c);
};
void Contained::method1(Container* c) {
cout << c->varA << endl;
...
}
----
JavaScript:
----
function Contained () {
this.var1=1;
this.var2=2;
this.method1=function (c) {
alert(c.varA);
};
}
----
Christof
