Write a function named promiseOrder that receives an Array of Promises as a parameter.
The function should return a Promise that will resolve to an Array of numbers - let's name it order - representing the order in which each of the input Promises was resolved.
const wait = (millis) => {
return new Promise((resolve) => {
setTimeout(() => resolve(), millis);
})
}
promiseOrder([
wait(100),
wait(1000),
wait(50)
]).then((order) => {
console.log(order); // [1, 2, 0]
});
/**
* The first Promise that resolves is the third one, so
* that means it will get index 0. Then, the first promise
* resolves, so it gets index 1. Finally, the second promise
* resolves, so it gets index 2.
*/