Thread-Safe Singleton in C#: A Guide to Double-Checked Locking and Lazy ApproachesThe Singleton pattern provides a globally accessible, single instance of a class, enhancing code flexibility and efficiency.
API with NestJS #148. Understanding the injection scopesNestJS default behavior is singleton provider scope for classes, sharing one instance for increased performance.Request scope can be implemented for classes like logged-in-user.service.ts to be initialized per HTTP request.