What does comb sorting mean? How to use comb sorting

Comb sorting is far less well-known than other sorting algorithms. It is an improvement based on bubble sorting and introduces concepts like "step size" and "subsequence". These two concepts are used in subsequent sorting algorithms. will be mentioned frequently.

Column to be sorted: {10, 2, 11, 8, 7} groupNums = length = 5

Step size coefficient (grouping coefficient) coefficient = 1.3

Sorting process As shown below.

##　Java

 1 package com.algorithm.sort; 2  3 import java.util.Arrays; 4  5 /** 6  * 梳排序 7  * Created by 余林丰 on 2017/6/20. 8  */ 9 public class Comb {10     public static void main(String[] args) {11         int[] nums = {10, 2, 11, 8, 7};12         nums = combSort(nums);13         System.out.println(Arrays.toString(nums));14     }15     16     /**17      * 梳排序18      * @param nums 待排序数组19      * @return 排好序的数组20      */21     private static int[] combSort(int[] nums) {22         float cofficient = 1.3f;    //步长系数（分组系数） = 1.3，大量试验获得的最佳值23         int groupNums = nums.length;24         boolean flag = false;25         while (groupNums > 1 || flag) {26             groupNums = (int) ((groupNums / cofficient) > 1 ? (groupNums / cofficient) : 1);27             flag = false;28             for (int i = 0; i + groupNums  nums[i + groupNums]) {30                     int temp = nums[i];31                     nums[i] = nums[i + groupNums];32                     nums[i + groupNums] = temp;33                     flag = true;34                 }35             }36         }37         return nums;38     }39 }

　Python3

 1 #梳排序 2 def comb_sort(nums): 3     cofficient = 1.3        #最佳系数 4     groupNums = len(nums) 5     flag = False 6     while groupNums > 1 or flag: 7         groupNums = int(groupNums / cofficient) if (groupNums / cofficient) > 1 else 1 8         flag = False 9         for i in range(len(nums)):10             if i + groupNums >= len(nums):11                 break12             if nums[i] > nums[i + groupNums]:13                 temp = nums[i]14                 nums[i] = nums[i + groupNums]15                 nums[i + groupNums] = temp16                 flag = True17         18     return nums19 20 nums = [10, 2, 11, 8, 7]21 nums = comb_sort(nums)22 print(nums)

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