A Few Practical Notes on SOLID

Points Worth Knowing

• Open/Closed means code should be open for extension but closed for modification.
• Dependency Inversion recommends high-level classes depend on abstractions (interfaces), not on implementation details.
• Following SOLID noticeably improves a codebase's testability, readability, and long-term maintainability.

Takeaway

None of these points are complicated on their own, but knowing them can lead to better technical decisions about SOLID on your next project.