SOLID Design Principles by Uncle Bob Explained

SOLID Design Principles by Uncle Bob Explained

There are many ways to reduce the dependency on one code section, but what if we want or need that change? SOLID are design patterns coined by Robert C. Martin to make it easier for software engineers to avoid issues and build adaptive, effective, and agile software.


Who is uncle bob??

SOLID stands for five basic principles of object-oriented programming laid out by Robert C. Martin; adhering to these practices helps prevent bad designs and refactoring and ensures maintainable and efficient code.


Currently, he is one of the world's best authorities on Agile software development and a recurring speaker at international gatherings and trade shows.


The most popular reason is that it's a play on R.C. Martin's name. Uncle Bob is also a nickname for someone generous with knowledge and experience.?


The SOLID principles are a set of five guidelines for software design that aim to make your code more maintainable, scalable, and predictable. They are:

  • Single Responsibility Principle (SRP) - A class should have only one reason to change.
  • Open-Closed Principle (OCP) - Software components should be open for extension but closed for modification.
  • Liskov Substitution Principle (LSP) - Subtypes must be substitutable for their base types.
  • Interface Segregation Principle (ISP) - Clients should not be forced to depend on interfaces they do not use.
  • Dependency Inversion Principle (DIP) - High-level modules should not depend on low-level modules; both should depend on abstractions.


These principles provide a roadmap for designing software in a way that is more modular, testable, and adaptable. By following these guidelines, you can write code that is easier to understand, maintain, and modify over time.


Why are these principles needed?

By following these principles, developers can break down their applications into smaller, more manageable pieces, making it easier to track down and fix problems and make changes to the codebase without causing unintended consequences.


How to follow the SOLID principles?

There is no one-size-fits-all answer to this question, as the SOLID principles need tailoring to specific codebase and project requirements.?

However, some tips include the following:

  • Breaking down the application into smaller classes and modules.
  • Keeping methods short and simple.
  • Defining interfaces for classes rather than forcing them to implement too many methods
  • Ensuring that high-level modules depend on abstractions, not on low-level modules or details.


The SOLID principles are guidelines for software application design that help achieve high-quality, well-organized, and maintainable code. By following these principles, developers can create code that is easier to understand and more resistant to change.


The benefits of using SOLID design principles are clear, with increased maintainability and scalability leading to better systems. Engineers worldwide can benefit from this method because it's used in many industries nowadays!

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