This chapter presented a number of different strategies for creating objects. These methods provide abstractions over the top of typical methods for creating objects. The Abstract Factory provides a method for building interchangeable kits or collections of related objects. The Builder pattern provides a solution to telescoping parameters issues. It makes the construction of large complicated objects easier. The Factory Method, which is a useful complement to Abstract Factory, allows different implementations to be created though a static factory. Singleton is a pattern for providing a single copy of a class that is available to the entire solution. It is the only pattern we've seen so far which has presented some questions around applicability in modern software. The Prototype pattern is a commonly used pattern in JavaScript for building objects based on other existing objects.

We'll continue our examination of classical design patterns in the next chapter by looking at structural patterns.