function quickSort(items, left, right) {

var index;

if (items.length > 1) {

left = typeof left != "number" ? 0 : left;

right = typeof right != "number" ? items.length - 1 : right;

index = partition(items, left, right);

if (left < index - 1) {

quickSort(items, left, index - 1);

}

if (index < right) {

quickSort(items, index, right);

}

}

return items;

}

// first call

var result = quickSort(items);