OOP IntroductionCristian Gherghinescu

“Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which are data structures that contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods.”

Wikipedia (source of all truth)

Main Selling points

Increase reusability and maintainability

Manage complex systems

Abstraction

Encapsulation

Inheritance

Polymorphism

Abstraction

Grouping the common behaviors

Representing essential features without including the background details or explanations

Hide the implementation

Encapsulation

Separate the contractual interface of an abstraction and its implementation

Allows an object’s behavior to be used without knowing its implementation (“black box”)

Packaging structure and behavior together in one unit - Makes objects more independent

Changes can be done to the behavior implementation without affecting other objects

Inheritance

“Is-a” relationship

Subclass reuses code from the base class (could also override behaviour)

Favor composition (has-a) over inheritance

Polymorphism

One name, many forms.

2 basic types of polymorphism:

Overridding - run-time polymorphismOverloading - compile-time polymorphism.

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