Definition
In programming, a singleton is a design pattern that restricts the instantiation of a class to one object. Think of it like the one and only chosen one, like Neo in *The Matrix*. There can only be one instance, preventing multiple versions from causing conflicts. This is useful for managing resources or coordinating actions across a system. It ensures a single point of access to a specific functionality. It's like having one supreme ruler in a kingdom. One central figure to keep order. It is common in software development.