mapAsync I
Implement mapAsync(items, fn): call an async mapping function fn(item) (it returns a promise) on every item at once, and resolve with the results in input order.
- Results come back in input order, whatever order the calls finish in.
itemscan be any iterable, not only an array. An empty input resolves to[].- Reject with the first rejection.
Your helper runs on a virtual clock, and the grader's fn logs when each call starts and settles.
Hints
Hint 1
Array.from(items, fn) turns any iterable into an array of promises, starting every call.
Hint 2
Promise.all keeps input order and rejects with the first rejection.