JS Practice — Built-in Objects

Array.fromAsync() — resolve an array of promises

📖 Usage Example

// Real usage (async context):
const promises = [Promise.resolve(1), Promise.resolve(2)]
const result = await Array.fromAsync(promises)
// → [1, 2]

Use Array.fromAsync() to resolve an iterable of promises into a plain array.

Array.fromAsync()

Array.fromAsync() is the async counterpart of Array.from(). It accepts an async iterable, a sync iterable, or an array-like object of promises and resolves them all into a plain array.

The synchronous equivalent is Promise.all(promises).then(Array.from), which this exercise uses so the tests can run synchronously.

Challenge: Implement resolveAll that takes an array of already-resolved numbers and returns them as a plain array (simulating what Array.fromAsync would do).

resolveAll([1, 2, 3]) // → [1, 2, 3]

💡 Hints (2)

• `Array.fromAsync(arrayOfPromises)` awaits each promise and collects results.
• The sync equivalent for already-resolved values is simply `Array.from(values)`.