Singleton Pattern
Explore the singleton pattern to understand how it ensures a class has a single instance and provides a global access point. Learn the key concepts such as private constructors and static getInstance methods that enable controlled instance creation. This lesson helps you grasp when and how to apply the singleton pattern effectively in C++ projects.
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Purpose
Sometimes a class only needs to have one pointer. For example, a system should only have one printer spooler, even though there may be several printers. Similarly, we can have multiple users on a website, but we don’t create a new server for every user. The server remains a singleton.
How can we make sure a class only has one instance and is easily accessible? To ensure that we can’t make multiple class objects, we make its constructor private. This means we won’t be able to create an object for the class. ...