You can configure these more advanced interaction properties using policies rather than explicitprogramming.
您可以使用策略而不是通过显式的编程来配置这些更高级的交互属性。
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If you've ever done any event-driven programming in the past, I think you'll find signals to be a refreshing change from the common practice of setting up an explicit event processing loop.
Imperative programs are formed by a sequence of statements with an explicit order, and their algorithms and programming constructs rely heavily on application state.