给一个数组和一个数字，将数字插入数字指定位置，使数组有序，不使用遍历

function insert(array, num) {
    var middle = Math.round(array.length / 2);
    var left = 0;
    var right = array.length
    while (right - left > 1) {
        if (num <= array[middle]) {
            right = middle;
        } else {
            left = middle;
        }
        middle = Math.round((right + left) / 2);
    }
    array.splice(middle, 0, num);
    console.log(array);
}