In software engineering, a design pattern is a general solution to a common problem in software design. A design pattern isn’t a finished design that can be transformed directly into code, it is a description or template for how to solve a problem that can be used in many different situations.
One of these design patterns is called the Singleton. It’s purpose can be described quite briefly as follows:
Ensure a class has only one instance and provide a global point of access to it.
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