योग्य पॅटर्न (किंवा काहीही नाही) निवडणे हे समस्या खोलवर समजून, पॅटर्न आणि त्यांच्या ट्रेड-ऑफ्स जाणून, आणि लाभ आणि जटिलता यांचा संतुलन साधण्यासाठी निर्णय लागू करून शक्य होते. लक्ष्य समस्या चांगल्या पद्धतीने सोडवणे आहे, पॅटर्न स्वतः साध्य नाही.
समस्येपासून सुरुवात करा, पॅटर्नपासून नाही
✓ UNDERSTAND THE PROBLEM first → what's the actual issue? (don't start by picking a pattern)
✓ Identify what you NEED → flexibility? decoupling? extensibility? simpler creation?
✓ Then ask: does a pattern address THIS problem well? (or is a simple solution better?)
→ problem-first, not pattern-first → avoid forcing patterns
पॅटर्न समस्यांशी जुळवा
Recognize which patterns fit which problems:
→ need ONE instance? → Singleton (or DI/module — consider alternatives)
→ decouple object creation? → Factory; complex construction? → Builder
→ swappable algorithms / eliminate conditionals? → Strategy
→ notify many of changes? → Observer; add behavior by wrapping? → Decorator
→ incompatible interfaces? → Adapter; simplify a subsystem? → Facade
→ undo/queue actions? → Command; control access? → Proxy
→ know the patterns' INTENT (the problem each solves) to recognize the fit
