如何手写一个 Promise.all？
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// 自定义 Promise.all 的实现
function myPromiseAll(promises) {
return new Promise((resolve, reject) => {
let results = [];
let count = 0;
for (let i = 0; i < promises.length; i++) {
promises[i].then((result) => {
results[i] = result;
count++;
if (count === promises.length) {
resolve(results);
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by thinkfuture
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