FirstFT: the day's biggest stories
Is Stuff Your Kindle Day the same as Amazon Kindle Unlimited?Everything you download on Stuff Your Kindle Day is yours to keep, and there's no limit on the number of books you can download. Stuff Your Kindle Day downloads don't count towards the 20 books that Amazon Kindle Unlimited subscribers can borrow at the same time.
，更多细节参见safew官方版本下载
// ⚠️ 易错点6：循环条件写成nums[left-1] = minVal（相等元素无需纳入无序区间）
const dropOld = Stream.push({ highWaterMark: 2, backpressure: 'drop-oldest' });