In this video, we conclude our extensive exploration of SOLID principles in software design. We've covered what SOLID principles are, common violations, and how to refactor code to comply with these principles. We also discuss the increased complexity that comes with adhering to these principles and whether it’s always necessary.
We'll revisit the basics of Object-Oriented Programming (OOP) to understand the foundation on which SOLID principles are built. Then, we’ll dive deep into each of the SOLID principles, questioning their practical application and exploring whether they should be considered absolute rules or flexible guidelines.
Key topics covered include:
Single Responsibility Principle (SRP): Does it really mean single responsibility, or could it be more about similar responsibilities?
Open/Closed Principle (OCP): The challenges of making your code open for extension but closed for modification.
Liskov Substitution Principle (LSP): Understanding substitutability beyond polymorphism and inheritance.
Interface Segregation Principle (ISP): Balancing the creation of specific interfaces without overwhelming your code with too many.
Dependency Inversion Principle (DIP): Differentiating between dependency inversion and dependency injection, and their roles in creating modular and flexible code.
As we wrap up, we emphasize the importance of applying these principles pragmatically rather than dogmatically, ensuring that your code remains simple, flexible, and easy to maintain.
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Links to other sources
/ why_every_element_of_solid_is_wrong
https://softwareengineering.stackexch...
https://dunnhq.com/posts/2021/solid-r...
The S.O.L.I.D. Principles of OO & Agile Design - Uncle Bob Martin - • The S.O.L.I.D. Principles of OO & Agi...
SOLID Deconstruction - Kevlin Henney - https://vimeo.com/157708450
Chapters
00:00 - Introduction to SOLID Principles
00:44 - Refactoring for SOLID Compliance
02:55 - Questioning the Complexity of SOLID
04:11 - Single Responsibility Principle (SRP)
06:55 - Open/Closed Principle (OCP)
10:30 - Liskov Substitution Principle (LSP)
14:30 - Interface Segregation Principle (ISP)
17:00 - Dependency Inversion Principle (DIP)
20:00 - Applying SOLID Principles Pragmatically
21:55 - Conclusion and Key Takeaways