Hands-on practice for this lecture. Work through the exercises and quizzes to reinforce what you've learned.
Exercise 1 of 1
Test the resilience of your design. Add new payment methods to a system and verify that your core logic requires zero code changes.
Processor Code Edits
In a Polymorphic Design, adding new payment methods requires ZERO changes to the existing processor logic. The system is "Open for Extension but Closed for Modification."
ðŸ—ï¸ Open-Closed Principle: You should be able to add new functionality without touching existing, tested code. Use Interfaces or Abstract Classes to create "pluggable" behavior.
Practical exercises to master the concepts.
Add a Triangle class to an area calculator without modifying the existing AreaCalculator logic.