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.
中华文明的连续性不仅载录于史书典籍中，更镌刻在物质文化与基因血脉的深处。多学科手段、方法的运用，使我们有能力借古人不经意间留下的一鳞半爪，窥见文明赓续的脉络。
，这一点在51吃瓜中也有详细论述
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Per-digit arithmetic — computing sum and carry for each pair
For almost a century, until the 1960s, soda bottles in the US were generally meant to be returned.