← Object-Oriented Programming learning pathObject-Oriented Programming · Module 8 of 10
SOLID principles
Design classes that are easy to change.
📖 Key ideas
- S: Single Responsibility – one reason to change.
- O: Open/Closed – open for extension, closed for modification.
- L: Liskov Substitution – subclasses must work where parents are expected.
- I: Interface Segregation – small, specific interfaces.
- D: Dependency Inversion – depend on abstractions, not concrete classes.
💡 Real-life example: SOLID is a set of house rules that keep a growing home organised.
SRPSingle Responsibility Principle
OCPOpen/Closed Principle
LSPLiskov Substitution Principle
DIPDependency Inversion Principle