← All tasksJavaScript · Junior

chunk: split an array into pieces

Write a function chunk(array, size) that splits an array into subarrays of length size. The last piece may be shorter.

For example, chunk([1, 2, 3, 4, 5], 2) returns [[1, 2], [3, 4], [5]]. Don't modify the original array.

function chunk(array, size) {
  // ...
}

Ctrl+Enter runs the tests. Tab indents; to leave the editor with the keyboard, press Esc and then Tab. Your code is saved in this browser.

Tests (5)

expect(chunk([1, 2, 3, 4, 5], 2)).toEqual([[1, 2], [3, 4], [5]]);

expect(chunk([1, 2, 3], 3)).toEqual([[1, 2, 3]]);

expect(chunk([1, 2], 5)).toEqual([[1, 2]]);

const source = [1, 2, 3];
chunk(source, 2);
expect(source).toEqual([1, 2, 3]);