Learning SOLID Programming Principles

Introduction to SOLID Programming

• Benefits of SOLID Programming Principles
• What could go wrong?
• What could go wrong? Part 2
• Overview of the SOLID principles

1. Interface Segregation Principle

• Introduction to the Interface Segregation Principle
• Problem domain objects: Individual data samples
• Collections of samples
• Reading and building samples

2. Liskov Substitution Principle

• Introduction to the Liskov Substitution Principle
• Duck Typing
• Interface variations
• Avoiding isinstance()

3. The Open/Closed Design Principle

• Introduction to the Open/Closed Design Principle
• Modifying a class and fixing bugs
• OCP via inheritance and composition
• More OCP extension techniques

4. Dependency Inversion Principle

• Introduction to the Dependency Inversion Principle
• Dependency injection and application configuration
• Testing consequences

5. Single-Responsibility Principle

• Introduction to single responsibility
• GRASP patterns: High cohesion and indirection
• More GRASP patterns

6. A Design Process

• CRC cards
• Test-driven design

Conclusion

• Apply SOLID principles to your work