new tasks

Task/Classes/JavaScript/classes.js

@@ -0,0 +1,24 @@
+//Constructor function.
+function Car(brand, weight) {
+  this.brand = brand;
+  this.weight = weight || 1000; // Resort to default value (with 'or' notation).
+}
+Car.prototype.getPrice = function() { // Method of Car.
+  return this.price;
+}
+
+function Truck(brand, size) {
+  this.car = Car;
+  this.car(brand, 2000); // Call another function, modifying the "this" object (e.g. "superconstructor".)
+  this.size = size; // Custom property for just this object.
+}
+Truck.prototype = Car.prototype; // Also "import" the prototype from Car.
+
+var cars = [ // Some example car objects.
+  new Car("Mazda"),
+  new Truck("Volvo", 2)
+];
+for (var i=0; i<cars.length; i++) {
+  alert(cars[i].brand + " " + cars[i].weight + " " + cars[i].size + ", " +
+      (cars[i] instanceof Car) + " " + (cars[i] instanceof Truck));
+}