动手做Get your hands on it
练习跟着课文走 —— 每节课尾都有本课的练习。这一页是全部练习的总库，想集中刷题的时候来。 每个练习都写清了它来自哪一节，卡住了就回去看那一节。Practice follows the lessons — every lesson ends with the exercises for that lesson. This page is the whole library, for when you want to drill in one sitting. Each exercise names the lesson it came from, so you can go back when you stall.
已筛到你正在学的《React 考试》。想看全部就点上面的「全部」。Filtered to React exam — the course you are on. Use “All” above to see everything.
练习Exercises
筛出 14 个练习（共 148 个） · 第 2 / 2 页。Showing 14 of 148 · page 2 / 2.假设签名改成 runTasks(promises: Promise<T>[], limit: number)， 调用方写 runTasks([task1(), task2(), task3()], 2)。 会发生什么？
Suppose the signature becomes runTasks(promises: Promise<T>[], limit: number) and the caller writes runTasks([task1(), task2(), task3()], 2). What happens?
有人写 return Promise.allSettled(tasks.map((t) => t()))。 它满足几条要求？
Someone writes return Promise.allSettled(tasks.map((t) => t())). How many of the requirements does it meet?