Web streams has no synchronous path. Even if your source has data ready and your transform is a pure function, you still pay for promise creation and microtask scheduling on every operation. Promises are fantastic for cases in which waiting is actually necessary, but they aren't always necessary. The new API lets you stay in sync-land when that's what you need.
// 3. 从后向前遍历，稳定排序的关键！
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She said: "When you play someone as strong as [Torchwood's] Gwen Cooper, someone so recognisable, it's quite difficult to come away from that or for other people to see you do anything differently.
"I think the hand is the hardest, most complex part of any humanoid robot," says Bren Pierce, the founder of robotics start-up, Kinisi, based in Bristol.