object()

Based on the idea that objects inherit from objects, Douglas Crockford advocates the use of an object() function that accepts an object and returns a new one that has the parent as a prototype.

function object(o) {
function F() {}
F.prototype = o;
return new F();
}

If you need access to an uber property, you can modify the object() function like so:

function object(o) {
var n;
function F() {}
F.prototype = o;
n = new F();
n.uber = o;
return n;
}

Using this function is the same as using the extendCopy(): you take an object such as twoDee, create a new object from it and then proceed to augmenting the new object.

var triangle = object(twoDee);
triangle.name = 'Triangle';
triangle.getArea = function () {
return this.side * this.height / 2;
};

The new triangle still behaves the same way:

>triangle.toString();
"Shape, 2D shape, Triangle"

This pattern is also referred to as prototypal inheritance , because you use a parent object as the prototype of a child object. It's also adopted and built...