Question

What can Inheritance be thought as in a functional objects world:

		simply adding an else to dispatch to the parent when none of the names for dispatch match in the case statement that looks up a method/lambda to return.
		pointless, since inheritance is never useful.
		relying on the ability to use boxes to put mutable state in a closure.
		essential to making objects work in a practical sense, since inheritance is the only required feature of objects.

Answer 1

INHERITANCE:

Inheritance is one of the most important concepts in OOP. It allows for the reuse of code by basing Objects or Classes on other Objects and implementing methods defined in the parent classes.

There are several layers to object-oriented programming (OOP) in JavaScript:

• Layer 1: Object-orientation with single objects (covered in Layer 1: Single Objects)
• Layer 2: Prototype chains of objects (described in Layer 2: The Prototype Relationship Between Objects)
• Layer 3: Constructors as factories for instances, similar to classes in other languages (discussed in Layer 3: Constructors—Factories for Instances)
• Layer 4: Subclassing, creating new constructors by inheriting from existing ones (covered in Layer 4: Inheritance Between Constructors)