Question

将接受数组的函数改变为可变参数函数。

给定一个函数，返回一个闭包，将所有输入收集到一个接受函数的数组中。

const collectInto = fn => (...args) => fn(args);

const Pall = collectInto(Promise.all.bind(Promise));
let p1 = Promise.resolve(1);
let p2 = Promise.resolve(2);
let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3));
Pall(p1, p2, p3).then(console.log);