Law of Demeter: A Practical Guide to Loose Coupling

on YouTube ↗56m

" summary

Shows concrete C++ examples that break and fix the Law of Demeter and claims applying LoD plus Single Responsibility and Dependency Inversion yields code that’s easier to change and test. Demonstrates constructor-based dependency injection, use of strong types and Concepts to catch mistakes at compile time, compares type erasure, std::variant and std::any tradeoffs, and wires objects in a composition/factory layer. Provides fakes and BDD-style tests as proof that the refactor makes the code looser coupled and more testable.

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" chapters (30)

1. 0:00Introduction to loose coupling
2. 0:33Motivation for better design
3. 1:36The essence of good design
4. 2:52Why tight coupling fails
5. 5:43Anti-patterns to avoid
6. 7:01Analyzing bad code examples
7. 9:28Common software problems
8. 10:38The Law of Demeter
9. 11:55How to fix tight coupling
10. 13:32Applying TDD and SOLID
11. 14:38Solid vs. Stupid principles
12. 15:52Single Responsibility Principle
13. 19:36Dependency Injection
14. 22:54Constructor injection tips
15. 24:53Pitfalls of Dependency Injection
16. 27:17Managing object creation
17. 30:15Refactoring chains of calls
18. 31:43Strongly typed APIs
19. 33:33Benefits of strong types
20. 35:33Dependency Inversion Principle
21. 37:18Polymorphism in C++
22. 39:31Type Erasure and std::variant
23. 41:41Injecting polymorphism
24. 43:27Templates and Concepts
25. 45:16Functional programming approach
26. 47:57Choosing the right abstraction
27. 48:58Refactoring example walk-through
28. 50:33Separating creation and logic
29. 52:03BDD and testing examples
30. 53:46Summary and takeaways

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