Functions·easy 10 min 50 XP
Callback Exercise
Write applyOperation(a, b, callback) that calls callback with a and b and returns the result.
Examples
- applyOperation(3, 4, (x, y) => x + y) → 7
Constraints
- Keep the required function name so the tests can find it
- Return a value instead of only logging it
- Do not mutate inputs unless the challenge asks you to
Callback Exercise · editor
Code runs in an isolated Web Worker with a 3-second timeout — no DOM access, and it can never hang the page.