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Differences between simple factories and factory methods: Simple factories and factory method patterns look very similar, especially specific factories in simple factories and factory methods. Simple factory, all things have been done in one place. However, the factory method creates a framework for subclasses to decide how to implement it. For example, in the factory method, the OrderPizza method creates a general framework to create pizza. The OrderPizza method relies on the factory method to create specific classes and make actual pizza. It is possible to decide what the actual products manufactured are by inheriting the factory. Simple factories do not have this flexibility.1. Is it better to find a decoration company or a private one for decoration-Advantages of decoration companies小葱低头不语。39. X.X.4Shallow water bombs (mines x 50)我的满足，就是一切，无论是张经还是谁，如果拦在我的**面前，那就是阻力。Artemisia absinthium