6
Understanding the Strategy, Abstract Factory, and Singleton Design Patterns
This chapter explores object creation using a few classic, simple, and yet powerful design patterns from the Gang of Four (GoF). These patterns allow developers to encapsulate behaviors, centralize object creation, add flexibility to their design, or control object lifetime. Moreover, they will most likely be used in all software you build directly or indirectly in the future.
GoF
Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides are the authors of Design Patterns: Elements of Reusable Object-Oriented Software (1994), and are also known as the GoF. In that book, they introduce 23 design patterns, some of which we look at in this book.
Why are they that ...
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