请教一个嵌套循环的写法

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This topic created in 2833 days ago, the information mentioned may be changed or developed.

类似下面这种，varN 的数目不固定，应该怎样写？

<code>
var1.write({
onComplete: function() {
setTimeout(function() {
var2.write({
onComplete: function() {
setTimeout(function() {
var3.write({
onComplete: function() {
setTimeout(function() {
var4.write();
}, 1000);
}
});
}, 1000);
}
});
}, 1000);
}
});
</code>

谢谢

7 replies • 2018-08-14 11:49:26 +08:00

Sparetire

Aug 11, 2018 via Android

async/await

qshu

Aug 11, 2018

var[n].write

947211232

Aug 11, 2018

递归

SakuraKuma

Aug 11, 2018

let
vars = [var1, var2, var3, etc...],
latency = 1e3,
run = () => {
let cVar = vars.shift();
cVar.write({
onComplete: setTimeout(run, latency)
})
};

setTimeout(run, latency);

大概这种感觉??

y051313

Aug 12, 2018

@SakuraKuma 多谢

e8c47a0d

Aug 14, 2018

let wait = duration => new Promise(resolve => setTimeout(resolve, duration))
let vs = [{}, {}, {}, ...] // 把这里的 {} 换成有 write 的对象

async function loop () {
for (let i = 0; i < vs.length; i++) { // 不要用 forEach
let v = vs[i]
await v.write()
await wait(1000)
}
}
loop()

e8c47a0d

Aug 14, 2018

v = {
async write () {
try {
// 在这里做处理
return true // 这个 return 可以缺省
}
catch (e) {
throw e
}
}
}