尽管只有简单工厂方法(Simple Factory Method)才是真正意义上的单件 (Singleton),但你会发现每一个特定的工厂类(这些类属于更为通用的factory模
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The getCalculator() factory method currently takes the very simple approach of assuming that all calculators created by this service will be accessed via the same service endpoint.
目前, getCalculator() 工厂方法采用了非常简单的方法,它假定由这个服务所创建的全部计算器都是通过相同的服务端点来访问的。
This can be as simple as invoking the base class's factory method and asserting that the returned object is of the correct type. For example.
这与调用基类的工厂方法并断言返回对象具有正确类型一样简单。
The cost of the network is lower and design method is simple, moreover, it can be widely used in various factory control systems.
该网络设计方法简单、成本低,它可广泛应用于各类工厂的控制系统。
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