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The design of Web streams predates async iteration in JavaScript. The for await...of syntax didn't land until ES2018, two years after the Streams Standard was initially finalized. This timing meant the API couldn't initially leverage what would eventually become the idiomatic way to consume asynchronous sequences in JavaScript. Instead, the spec introduced its own reader/writer acquisition model — and that decision rippled through every aspect of the API.
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A complex spec creates complex edge cases. The Web Platform Tests for streams span over 70 test files, and while comprehensive testing is a good thing, what's telling is what needs to be tested.
既然无法陪伴，那就在其他方面做到更好：更贵的寄养、更高端的宠粮、更智能的监控。春节宠物消费虽不是刚需，但这种补偿心理在此刻不再只是满足需求，而是承担一种情绪修复的功能。，更多细节参见同城约会
方向遍历顺序说明下一个倒序（从右往左）先处理右侧，栈里存「右侧候选」上一个正序（从左往右）先处理左侧，栈里存「左侧候选」
self.published = published，这一点在91视频中也有详细论述