Array Flattening with Depth
easyArrays & Objects+150 XPFrontend AlgoArena
Nested array structures are common in JSON APIs. Implement a custom array flattener flatten(arr, depth).
What it has to do
- Recursively flatten sub-arrays up to
depth. - Default depth should be 1 if not specified.
- Do not mutate original array.
Where it's been asked
- Meta
- Amazon
From public interview reports — a problem very like this one has shown up in a round at these companies. Not an exhaustive list.
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Need a nudge?
Reveal a conceptual hint or the reference solution. Both were written and reviewed with the problem — no runtime magic.
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