CODE EXAMPLE FOR JAVASCRIPT

chunk array

function Chunk(arr = [], size = 1) {
    return arr.length ? arr.reduce((t, v) => (t[t.length - 1].length === size ? t.push([v]) : t[t.length - 1].push(v), t), [[]]) : [];
}

const arr = [1, 2, 3, 4, 5];
Chunk(arr, 2); // [[1, 2], [3, 4], [5]]