/**
* @param {Array} arr
* @param {number} size
* @return {Array}
*/
var chunk = function(arr, size) {
const chunked = [];
let chunk = [];
for (let i = 0; i < arr.length; i++){
chunk.push(arr[i]);
if (chunk.length == size || i == arr.length -1){
chunked.push(chunk);
chunk = [];
}
}
return chunked;
};