Singleton

A Singleton is a design pattern in software development that ensures a class has only one instance throughout an application. Think of it like a single decision-maker or a single shared resource—everyone who needs it accesses the same instance. This approach is useful for managing shared data or configurations. For example, a single database connection manager in an application can be implemented as a Singleton to prevent multiple, conflicting connections. By controlling the creation of the instance, a Singleton maintains consistency and prevents unintended duplication, making the system more predictable and efficient.