const chunk = (array, chunkSize) => {
	var tempArray = [];
	for (var i = 0; i < array.length; i+= chunkSize) {
		tempArray.push(array.slice(i, i+chunkSize));
	}
	return tempArray
}


chunk([1,2,3,4,5,6,7,8,9,10,11],2)
// returns: [ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 10 ], [ 11 ] ]