js实现shell排序

//shell排序配插入排序
function shell_insert_sort(arr){
    var gap = arr.length;
    do{
        gap = parseInt(gap/3) + 1;
        console.log(gap);
        for(var i = gap; i < arr.length; i+= gap){
            var tmp = arr[i];
            for( var j = i - gap; j >= 0 && tmp < arr[j]; j -= gap){
                arr[j + gap] = arr[j];
            }
            arr[j+gap] = tmp;
        }
    }while(gap > 1);

}
//shell排序配交换排序
function shell_bubble_sort(arr){
    gap = arr.length;
    var flag = true;
    do{
        gap = parseInt(gap/3) + 1;
        flag = true;
        for(var i = 0; i < arr.length && flag ; i += gap){
            flag = false;
            console.log(arr)
            for(var j = 0; j < arr.length - i - gap; j += gap){
                if(arr[j] > arr[j + gap]){
                    swap(arr, j, j + gap);
                    flag = true;
                }
            }
        }
    }while(gap > 1);
}

function swap(arr, i, j){
    var tmp = arr[i];
    arr[i] = arr[j];
    arr[j] = tmp;
}

var arr = [1, 99, 23, 88, 56, 77, 3];
shell_bubble_sort(arr);
//shell_insert_sort(arr)
console.log(arr);