4. Inheritance #

Created Thursday 25 March 2021

4. Inheritance - Simple.
   • Suppose we are making a MOBA. Our players can be a Wizard, Healer, etc.
   • How to handle object creation, and then allot them their type.

Approach - Make a Player class, having a function with a switch(type_input) which creates the required object, and also adds Player properties to it.

• This approach is good, but it has many practical and theoretic problems, which are solved using inheritance:
  1. We have two classes, Player and Wizard(which contains everything from Player. This is hampering extensibility - what if we had a Wizard which was female, we’d have to work on Player, Wizard and the new female class. The code would be very clumsy. Code reuse is easy.
  2. It makes code **maintainable **- Changing the superclass, will reflect the change in all the subclasses, if such a change is ever required.
• All this is implemented and the simplified approach is called inheritance. It can be tricky, but is way better than the manual way.
• Syntax: Use extends keyword.

Note:

• Classes are nothing but syntactic sugar introduced from ES6 2015
• All OOPS syntax is a subset of Java syntax.
• No access modifiers exist in Javascript