/**
 * @param {Array} arr
 * @param {number} size
 * @return {Array[]}
 */
var chunk = function(arr, size) {
    let chunked = [];

    let current = new Array();
    for (let i = 0; i < arr.length; ++i) {
        current.push(arr[i]);

        if ((i + 1) % size == 0) {
            chunked.push(current);
            current = new Array();
        }
    }

    if (current.length > 0) {
        chunked.push(current);
    }

    return chunked;
};