These patterns deal with object creation mechanisms. Instead of just using new Object() , you learn to use , Abstract Factory , and Singleton to make your system independent of how its objects are created. 2. Structural Patterns (The "What")
: It emphasizes foundational concepts like SOLID principles (Single Responsibility, Open/Closed, etc.) and best practices such as "favoring composition over inheritance" and "programming to an interface, not an implementation". dive into design patterns pdf github free
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These explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient. Think of , Decorator , and Facade . 3. Behavioral Patterns (The "Why") you learn to use