S.O.L.I.D Principles Explained With Code

Writing clean, maintainable code is just as important as writing code that works.

The SOLID principles provide a blueprint for writing code that’s easy to adjust, extend, and maintain over time.

It was introduced by Robert C. Martin (Uncle Bob) in the early 2000s.

In this article, we will explore each of the 5 principles with real world examples and code:

S: Single Responsibility Principle (SRP)

A class should have one, and only one, reason to change.

This means that a class must have only one responsibility.

When a class performs just one task, it contains a small number of methods and member variables making them more usable and easier to maintain.

If a class has multiple responsibilities, it becomes harder to understand, maintain, and modify and increases the potential for bugs because changes to one responsibility could affect the others.

Code Example:

Imagine you have a class called UserManager that handles user authentication, user profile management, and email notifications.