Promise.all
Implement Promise.all from scratch.
Signature
function promiseAll<T>(promises: Promise<T>[]): Promise<T[]>Behavior
- Takes an array of Promises
- Resolves with an array of results, preserving order
- If any Promise rejects, reject with that error immediately
- An empty array should resolve with
[]
Hint
You’ll need to track how many promises have resolved and where each result belongs.
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