Question

Is this possible and if so how? (I haven’t been able to find a way for it to work)

var foo = function() 
{ 
    console.log("Original Function");
    this = function() 
    {
        console.log("New Function");
    }
};
console.log("Calling foo()");
foo();

Desired output:

Original Function

Calling foo()

New Function

To answer the questions in advance, yes I know there are other ways to do this. I’m just curious if I could do something like var bar = new foo(); and have foo() assign some time dependent properties to itself without an extra function.

EDIT: Response to Charmanders question, and a slightly less simplified, more practical application

var node = function(parent)
{
    this = function()
    {
        for (i in this)
        {
            // perform actions (which will occasionally include calling i()
        }
    }
    if (parent !== null)
    {
        this.parent = parent;
        // code to determine children
        this.somechild = new node(this);
        this.someotherchild = new node(this);
    }
};
var ancestor = new node(new node(null));

Answer 1

Assigning a new value to this will not work, but you can simply return a function:

var foo = function() { 
    console.log("Original Function");
    return function() {
        console.log("New Function");
    };
};

console.log("Calling foo()");
var f = foo(); /* or even: f = new foo(); */
f();