A Gang of Four creational design pattern that restricts a class to exactly one instance and provides a single global point of access to it, commonly used for shared resources such as a configuration object or a connection pool.
Facts
Core PrincipleRestricts a class to exactly one instance and provides a single well-known point of access to it, used when exactly one object must coordinate actions across a system. 2 Connections
Associated With
Erich Gamma, Pioneers Erich Gamma co-authored the 1994 Design Patterns book that named and catalogued the Singleton pattern among the original 23.
In Field
Sources
1. Wikipedia: Design Patterns (book)
Wikimedia FoundationLead section, first sentenceQuote, Lead section, first sentence
Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns.
2. Wikipedia: Singleton Pattern
Wikimedia FoundationLead section, first sentenceQuote, Lead section, first sentence
the singleton pattern is a software design pattern that restricts the instantiation of a class to a singular instance.
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