Exercises

1. Implement multiple inheritance but with a prototypal inheritance pattern, not property copying. For example:

   var my = objectMulti(obj, another_obj, a_third, {
   additional: "properties"
   });

   The property additional should be an own property, all the rest should be mixed into the prototype.

2. Use the canvas example to practice. Try out different things, for example:

   • Draw a few triangles, squares, and rectangles.

   • Add constructors for more shapes, such as Trapezoid, Rhombus, Kite, and Pentagon. If you want to learn more about the canvas tag, create a Circle constructor too. It will need to overwrite the draw() method of the parent.

   • Can you think of another way to approach the problem and use another type of inheritance?

   • Pick one of the methods that uses uber as a way for a child to access its parent. Add functionality where the parents can keep track of who their children are. Perhaps by using a property that contains a children array?