Implement _.chunk(array, size)

Question

Accepted Answer

**Approach:** Slice in steps of `size`.

```javascript
function chunk(array, size = 1) {
  if (!Array.isArray(array) || size < 1) return [];
  const res = [];
  for (let i = 0; i < array.length; i += size) res.push(array.slice(i, i + size));
  return res;
}

// Demo
console.log(chunk([1,2,3,4,5], 2)); // [[1,2],[3,4],[5]]
console.log(chunk(['a','b','c','d'], 3)); // [['a','b','c'],['d']]
console.log(chunk([1,2], 5)); // [[1,2]]
console.log(chunk([], 2)); // []
console.log(chunk([1,2,3], 1)); // [[1],[2],[3]]
function* chunkGen(arr, size) { for (let i = 0; i < arr.length; i += size) yield arr.slice(i, i+size); }
console.log([...chunkGen([1,2,3,4], 2)]); // [[1,2],[3,4]]
```
Used for pagination & batching API calls.

Implement _.chunk(array, size)

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Understand the problem

Attempt it yourself

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Solution ready — 2 min read

Join the discussion

Discussion (0)

KEEP THESTREAK ALIVE.

KEEP THE
STREAK ALIVE.