That said, it's important to recognize that locking in itself is not bad. It does, in fact, serve an important purpose to ensure that applications properly and orderly consume or produce data. The key challenge is with the original manual implementation of it using APIs like getReader() and releaseLock(). With the arrival of automatic lock and reader management with async iterables, dealing with locks from the users point of view became a lot easier.
- 子节点i的父节点: (i-1)/2
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延禧攻略：谷歌遭禁無礙問鼎全球第一熱搜劇2018年12月24日