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

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Split into chunks	snippet	javascript	array	filter-coffee-pot	2020-11-03T21:35:12+02:00

Chunks an array into smaller arrays of a specified size.

• Use Array.from() to create a new array, that fits the number of chunks that will be produced.
• 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 chunk = (arr, size) =>
  Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
    arr.slice(i * size, i * size + size)
  );

chunk([1, 2, 3, 4, 5], 2); // [[1, 2], [3, 4], [5]]