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观察者模式实现

观察者模式:我需要一个能够在对象之间建立一对多的依赖关系的观察者模式,希望文档能够详细、清晰地描述该模式的实现方式,并提供一些实用的代码示例和注意事项。

Added May 19, 20260 runsPrompt content hidden — try it to see the output

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