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比如使用队列来更新数据库中的记录, 队列中的对象有时候会出现同一个的 class 的不同 mutation,不同的mutation 示例实际上只有处于队列末端的元素是最近的一次更新,其他的 mutation 可以忽略掉,甚至不调用 handle 进行处理,因此队列中需要根据 key 的来维护一个唯一性的元素。
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比如使用队列来更新数据库中的记录, 队列中的对象有时候会出现同一个的 class 的不同 mutation,不同的mutation 示例实际上只有处于队列末端的元素是最近的一次更新,其他的 mutation 可以忽略掉,甚至不调用 handle 进行处理,因此队列中需要根据 key 的来维护一个唯一性的元素。
The text was updated successfully, but these errors were encountered: