Design Patterns: Focus on the Problems They Solve, Not Just Their Names
The article explains why memorizing design pattern names is insufficient, introduces core design principles (SRP, OCP, LSP, DIP, ISP, LoD), and walks through seven high‑frequency patterns—Singleton, Factory, Adapter, Decorator, Proxy, Observer, and Strategy—using an evolving order‑processing system to show how each pattern addresses changeability and extensibility.
