Singleton pattern
Programming technique to restrict a class to a single instance
Singleton pattern
In object-oriented programming, the singleton pattern is a software design pattern that restricts the instantiation of a class to a singular instance. It is one of the well-known "Gang of Four" design patterns, which describe how to solve recurring problems in object-oriented software. The pattern is useful when exactly one object is needed to coordinate actions across a system. More specifically, the singleton pattern allows classes to: Ensure they only have one instance Provide easy access to that instance Control their instantiation (for example, hiding the constructors of a class) The term comes from the mathematical concept of a singleton.
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