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function bucketSort(arr, bucketSize) {
    if (arr.length === 0) {
      return arr;
    }

    var i;
    var minValue = arr[0];
    var maxValue = arr[0];
    for (i = 1; i < arr.length; i++) {
      if (arr[i] < minValue) {
          minValue = arr[i];                // Minimum value of input data
      } else if (arr[i] > maxValue) {
          maxValue = arr[i];                // Maximum value of input data
      }
    }

    // Initialization of buckets
    var DEFAULT_BUCKET_SIZE = 5;               // Set the default number of buckets to 5
    bucketSize = bucketSize || DEFAULT_BUCKET_SIZE;
    var bucketCount = Math.floor((maxValue - minValue) / bucketSize) + 1; 
    var buckets = new Array(bucketCount);
    for (i = 0; i < buckets.length; i++) {
        buckets[i] = [];
    }

    // Use the mapping function to distribute data into each bucket
    for (i = 0; i < arr.length; i++) {
        buckets[Math.floor((arr[i] - minValue) / bucketSize)].push(arr[i]);
    }

    arr.length = 0;
    for (i = 0; i < buckets.length; i++) {
        insertionSort(buckets[i]);                       // Sort each bucket, insertion sort is used here
        for (var j = 0; j < buckets[i].length; j++) {
            arr.push(buckets[i][j]);                      
        }
    }

    return arr;
}

public class BucketSort implements IArraySort {

    private static final InsertSort insertSort = new InsertSort();

    @Override
    public int[] sort(int[] sourceArray) throws Exception {
        // Copy arr to avoid changing the content of the argument
        int[] arr = Arrays.copyOf(sourceArray, sourceArray.length);

        return bucketSort(arr, 5);
    }

    private int[] bucketSort(int[] arr, int bucketSize) throws Exception {
        if (arr.length == 0) {
            return arr;
        }

        int minValue = arr[0];
        int maxValue = arr[0];
        for (int value : arr) {
            if (value < minValue) {
                minValue = value;
            } else if (value > maxValue) {
                maxValue = value;
            }
        }

        int bucketCount = (int) Math.floor((maxValue - minValue) / bucketSize) + 1;
        int[][] buckets = new int[bucketCount][0];

        // Use the mapping function to distribute data into each bucket
        for (int i = 0; i < arr.length; i++) {
            int index = (int) Math.floor((arr[i] - minValue) / bucketSize);
            buckets[index] = arrAppend(buckets[index], arr[i]);
        }

        int arrIndex = 0;
        for (int[] bucket : buckets) {
            if (bucket.length <= 0) {
                continue;
            }
            // Sort each bucket, insertion sort is used here
            bucket = insertSort.sort(bucket);
            for (int value : bucket) {
 
head2 = head2->mNext;
}
dummy = dummy->mNext;
}
if (NULL != head1) dummy->mNext = head1;
if (NULL != head2) dummy->mNext = head2;

return dummyNode.mNext;
}

void BucketSort(int n, int arr[]){
    vector<ListNode*> buckets(BUCKET_NUM, (ListNode*)(0));
    for (int i = 0; i < n; ++i) {
        int index = arr[i] / BUCKET_NUM;
        ListNode *head = buckets.at(index);
        buckets.at(index) = insert(head, arr[i]);
    }
    ListNode *head = buckets.at(0);
    for (int i = 1; i < BUCKET_NUM; ++i) {
        head = Merge(head, buckets.at(i));
    }
    for (int i = 0; i < n; ++i) {
        arr[i] = head->mData;
        head = head->mNext;
    }
}

>

Reference address:

https://github.com/hustcc/JS-Sorting-Algorithm/blob/master/9.bucketSort.md

https://zh.wikipedia.org/wiki/Bucket_sort

##

-

** zihe.zhu

** zih***[email protected]

** [Reference address](https://github.com/IamHehe/TrySort/blob/master/9.bucket_sort.py)

** zihe.zhu

** zih***[email protected]

** [Reference address](https://github.com/IamHehe/TrySort/blob/master/9.bucket_sort.py)

-

** Azerjiang

** bju***[email protected]

I didn't include the C# version, let me write it, the code is as follows:

    if (new_node->elem <= cur->elem)
    {
        if (pre == cur)
        {
            new_node->list_next = cur;
            bucket_mgr->buckets[index] = new_node;
        }
        else
        {
            new_node->list_next = cur;
            pre->list_next = new_node;
        }
    }
    else
    {
        cur->list_next = new_node;
    }

}
return 0;

BucketSpaceManager* space_mgr = init_bucket_space(size);
if (!space_mgr)
{
    printf("out of memory,File:%s, Func:%s, Line:%d\n", __FILE__, __func__, __LINE__);
    goto exit_1;
}

int bucket_nums = (max - min) / BUCKET_SIZE + 1;
BucketManager* bucket_mgr = init_buckets(bucket_nums);
if (!bucket_mgr)
{
    goto exit_2;
}
int i;
for (i = 0; i < size; ++i)
{
    int index = (arr[i] - min) / BUCKET_SIZE;
    Node* new_node = get_bucket_space(space_mgr);
    if (!new_node)
    {
        goto exit_3;
    }
    new_node->elem = arr[i];
    new_node->list_next = NULL;
    insert_bucket(bucket_mgr, index, new_node);
}
for (i = 0; i < bucket_mgr->nums; ++i)
{
    Node* node = bucket_mgr->buckets[i];
    while(node)
    {
        printf("%d ", node->elem);
        node = node->list_next;
    }
}
printf("\n");