一道题目，实现延时队列，结构是 value 和 time，time 表示延时时间，队列里数据顺序执行（避免并发），有知道 eventloop 每次 tick 会取出一个 promise 的特性可以实现，还有其他什么办法么？
注意：纯 JS
This topic created in 2324 days ago, the information mentioned may be changed or developed.
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1
Zenyk Feb 5, 2020
generate、requestanimationframe
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2
lovedebug Feb 5, 2020
生成器 + promise 可以实现
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rabbbit Feb 5, 2020
function sleep(time) {
return new Promise(resolve => { setTimeout(() => { resolve(); }, time); }); } async function queue(jobs, func) { console.log(jobs); for (let i of jobs) { await sleep(i.time) func(i.value) } } const jobs = [ { value: 1, time: 1000 }, { value: 2, time: 1000 }, { value: 3, time: 1000 }, { value: 4, time: 1000 }, { value: 5, time: 1000 } ]; queue(jobs, (value)=> console.log(value)); |
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f0rger Feb 5, 2020 via iPhone
Promise，Array.reduce
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5
rabbbit Feb 5, 2020
function sleep(time) {
return new Promise(resolve => { setTimeout(() => { resolve(); }, time); }); } async function* queue(jobs) { for (let i of jobs) { await sleep(i.time) yield i.value } } const jobs = [ { value: 1, time: 1000 }, { value: 2, time: 1000 }, { value: 3, time: 1000 }, { value: 4, time: 1000 }, { value: 5, time: 1000 } ]; (async function(){ for await (let i of queue(jobs)) { console.log(i); } })(); |
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