JavaScript : Object-Oriented Programming

Organizing the blueprints – classes

So far, our object-oriented solution includes four classes with their attributes and methods. However, if we take another look at these four classes, we would notice that all of them have the same two methods: CalculateArea and CalculatePerimeter. The code for the methods in each class is different, because each shape uses a different formula to calculate either the area or the perimeter. However, the declarations or the contracts for the methods are the same. Both methods have the same name, are always parameterless, and both return a floating-point value.

When we talked about the four classes, we said we were talking about four different geometrical shapes or simply, shapes. Thus, we can generalize the required ...