How to do object oriented programming the right way?
The class keyword from ES6 is used to create the Person class with properties stored in this called firstName and lastName, which are set in the constructor and accessed in the getFullName method. We instantiate an object called person from the Person class with the new key word as follows: Objects created using the new keyword are mutable.
What is the purpose of inheritance in OOP?
The goal of inheritance is to speed up development by promoting code reuse. In classical OOP, classes are blueprints for objects. Objects are created or instantiated from classes. There’s a constructor that is used to create an instance of the class with custom properties.
How to extend a class in object oriented programming?
To extend a class, we can create another class. Let’s extend the Person class to make a User. A User is a Person with an email and a password. In the code above, we created a User class which extends the capability of the Person class by adding email and password properties and accessor functions.
How is encapsulation achieved in object oriented programming?
Encapsulation is achieved when each object keeps its state private, inside a class. Other objects don’t have direct access to this state. Instead, they can only call a list of public functions — called methods. So, the object manages its own state via methods — and no other class can touch it unless explicitly allowed.
How is abstraction different from object oriented programming?
Even though it is most commonly associated with object-oriented programming, the concept itself is in fact separatefrom it and can be implemented without using objects. Abstraction is a complementary conceptto encapsulation here; where encapsulation hides internal information, abstraction provides an easier-to-use public interface to data.
What’s the problem with inheritance in object oriented programming?
The problem with inheritance is that the descendants have too much access to the implementation details of every base class in the hierarchy, and vice versa. When the requirements change, refactoring a class hierarchy is so hard that it turns into a WTF sandwich with traces of outdated requirements.