Prototype Inheritance - extends.

Prototype Inheritance

function Car(make) {
  this.make = make;
}

Car.prototype.drive = function() {
	console.log('driving ' + this.make);
};



function Toyota() {
    Car.call(this, "Toyota");
}

function F(){}

// The basis for "extends".
// F.prototype = Car.prototype;
// Toyota.prototype = new F;




var tt = new Toyota();






function extend(child, parent, options) {
	function F() {}
	F.prototype = parent.prototype;
	child.prototype = new F;
	for(var prop in options) {
		child.prototype[prop] = options[prop];
	}
	return child;
}


var Toyota = extend(Toyota, Car, {
    honk: function() {
      console.log("honking " + this.make);
    }
});

// var tt = new Toyota();
// tt.honk();