30-seconds-of-code/snippets/js/s/chunk-into-n.md

title, type, language, tags, author, cover, dateModified

title	type	language	tags	author	cover	dateModified
Split array into n chunks	snippet	javascript	array	chalarangelo	dark-leaves-2	2020-11-03T21:46:13+02:00

Chunks an array into n smaller arrays.

• Use Math.ceil() and Array.prototype.length to get the size of each chunk.
• Use Array.from() to create a new array of size n.
• Use Array.prototype.slice() to map each element of the new array to a chunk the length of size.
• If the original array can't be split evenly, the final chunk will contain the remaining elements.

const chunkIntoN = (arr, n) => {
  const size = Math.ceil(arr.length / n);
  return Array.from({ length: n }, (v, i) =>
    arr.slice(i * size, i * size + size)
  );
}

chunkIntoN([1, 2, 3, 4, 5, 6, 7], 4); // [[1, 2], [3, 4], [5, 6], [7]]