𝐇𝐨𝐰 𝘁𝗼 𝐬𝗲𝗹𝗲𝗰𝘁 𝐰𝐡𝐢𝐜𝐡 𝗗𝗲𝘀𝗶𝗴𝗻 𝗣𝗮𝘁𝘁𝗲𝗿𝗻 𝐭𝐨 𝐮𝐬𝐞? Choosing the correct design pattern in software engineering is critical to practical problem-solving. This post will try to simplify the process, helping you decide between patterns based on specific needs. To select a pattern, we must first go through the problem identification. If the problem is related to: 🔸 Object Creation? → Creational Patterns 🔸 Object Assembly? → Structural Patterns 🔸 Object Interactions? → Behavioral Patterns 1. Singleton: Ensures only one instance exists. 2. Factory Method: Delegates object instantiation to subclasses. 3. Abstract Factory: Creates related object families without specifying their concrete classes. 4. Prototype: Clones objects for a prototypical instance. 5. Builder: Constructs complex objects step by step. 6. Adapter: Bridges incompatible interfaces. 7. Bridge: Separates abstraction from implementation. 8. Composite: Treats single and composite objects uniformly. 9. Decorator: Adds behaviors to objects dynamically. 10. Facade: Simplifies complex system interfaces. 11. Flyweight: Shares objects to reduce memory. 12. Proxy: Controls object access. 13. Observer: Notifies changes to multiple objects. 14. Strategy: Encapsulates interchangeable algorithms. 15. Command: Encapsulates a request as an object. 16. State: Changes object behavior with internal state. 17. Visitor: Adds operations to object structures without modifying them. 18. Memento: Captures and restores object states externally. 19. Iterator: Sequentially accesses elements of a collection. 20. Mediator: Centralizes complex communications. 21. Chain of Responsibility: Passes requests along a chain of handlers. 22. Template Method: Defines the skeleton of an algorithm. 📌 Reference: 𝐆𝐫𝐨𝐤𝐤𝐢𝐧𝐠 𝐃𝐞𝐬𝐢𝐠𝐧 𝐏𝐚𝐭𝐭𝐞𝐫𝐧𝐬 𝐟𝐨𝐫 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐬 𝐚𝐧𝐝 𝐌𝐚𝐧𝐚𝐠𝐞𝐫𝐬 - https://lnkd.in/gHYiMuEh 📌 Join my 𝐟𝐫𝐞𝐞 𝐧𝐞𝐰𝐬𝐥𝐞𝐭𝐭𝐞𝐫 to learn tips on system design and problem-solving: https://lnkd.in/gpHAFd9t #designpatterns #systemdesign #softwarearchitecture #interview