The SOLID principles
Category : SOLID
| Sub Category : SOLID Principles | By Prasad Bonam Last updated: 2024-01-10 09:39:44
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The SOLID principles:
The SOLID principles are a set of five design principles for writing maintainable and scalable software. Each principle focuses on a specific aspect of software design and encourages the development of clean, modular, and flexible code. Here is a brief overview of each SOLID principle:
Single Responsibility Principle (SRP):
- A class should have only one reason to change, meaning it should have only one responsibility or job. This principle encourages a class to encapsulate a single piece of functionality, making the code more modular and easier to maintain.
Open/Closed Principle (OCP):
- Software entities (classes, modules, functions, etc.) should be open for extension but closed for modification. This means that you can add new functionality to a system without altering existing code. The idea is to achieve extensibility through polymorphism and interfaces rather than modifying existing code.
Liskov Substitution Principle (LSP):
- Subtypes must be substitutable for their base types without altering the correctness of the program. In other words, if a class is a subtype of another class, it should be able to replace its parent without affecting the functionality of the program. This principle ensures that inheritance relationships maintain behavioural compatibility.
Interface Segregation Principle (ISP):
- No client should be forced to depend on methods it does not use. This principle suggests that a class should not be forced to implement interfaces it doesn`t need. It`s better to have multiple small, specific interfaces rather than a large, general-purpose interface.
Dependency Inversion Principle (DIP):
- High-level modules should not depend on low-level modules; both should depend on abstractions. Abstractions should not depend on details; details should depend on abstractions. This principle promotes the use of interfaces or abstract classes to create a flexible and decoupled architecture.
By following these SOLID principles, developers can create code that is more modular, maintainable, and adaptable to change over time. These principles are widely used in object-oriented design and are considered foundational for writing high-quality software.