Numerous design patterns let you extend functionality; for example, in Java Design Patterns you’ve seen how to extend functionality with the Proxy, Decorator, and Strategy patterns.

The strategy design pattern is a Gang-of-Four (GoF) design pattern. It is a behavioral pattern used to define a family of algorithms and encapsulate each of them inside a class.

The model-view-controller design pattern is pervasive throughout the industry. From JavaScript frameworks like Angular, to Java standards like Spring MVC, an MVC-based approach is a proven strategy ...