Chunk an Array

Console

IntermediateArrays

Task

Implement `chunk(items, size)` splitting the array into subarrays of length `size`; the last chunk keeps whatever remains. `chunk([1,2,3,4,5], 2)` → `[[1,2],[3,4],[5]]`. Assume size ≥ 1.

Hints

0 / 2

Loop with i += size and slice(i, i + size) — slice safely clips past the end.
items.slice(i, i + size) never throws, even when fewer elements remain.

Verification tests

chunk([1,2,3,4,5], 2)→ [[1,2],[3,4],[5]]
chunk([1,2,3,4], 2)→ [[1,2],[3,4]]
chunk([7], 3)→ [[7]]
chunk([], 2)→ []

⚠️ Reveal official solution

Try solving it yourself first — struggling is where the learning happens.

function chunk(items, size) {
  const out = [];
  for (let i = 0; i < items.length; i += size) {
    out.push(items.slice(i, i + size));
  }
  return out;
}

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