This chapter covers the singleton pattern.
GoF Definition
Ensure a class only has one instance, and provide a global point of access to it.
Concept
A class cannot have multiple instances. Once created, the next time onward, you use only the existing instance. This approach helps you restrict unnecessary object creations in a centralized system. The approach also promotes easy maintenance.
Real-World Example
Let’s assume that you are a member of a sports team, and your team is participating in a tournament. Your team needs to play against multiple opponents throughout the tournament. ...
