笔者购买的 Lumia 830我其实踩过一次坑，多年前我买过一台 Lumia 830，原本运行的是 Windows Phone 8.1。出于「系统就该升到最新版」的惯性思维，我把它升级到了 Windows 10 Mobile。那种原本流畅、直接的感觉被削减了，把玩几天后我最终把它出掉。这也成了我后来一直耿耿于怀的一次升级。
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I want to pause on that for a moment, because it’s important. Composition lets us combine primitive CRDTs into more complex ones. When it’s time to merge, all the parent does is pass slices of incoming state to the appropriate child’s merge function. We can nest this process as many times as we want; each complex CRDT passing ever-smaller slices of state down to the next level, until we finally hit a primitive CRDT that performs the actual merge.
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