Home >Web Front-end >JS Tutorial >Summary of javascript array sorting_javascript skills

Summary of javascript array sorting_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:51:011200browse

Javascript array sorting summary

//排序算法
  window.onload = function(){
    var array = [0,1,2,44,4,
          324,5,65,6,6,
          34,4,5,6,2,
          43,5,6,62,43,
          5,1,4,51,56,
          76,7,7,2,1,
          45,4,6,7,8];
    //var array = [4,2,5,1,0,3];
    console.log('原始数组');
    console.log(array);
    array = sorting.shellSort(array);
    // alert(array);
    console.log('排序后的数组')
    console.log(array);
  }
   
  var sorting = {
    //利用sort方法进行排序
    systemSort: function(arr){
      return arr.sort(function(a,b){
        return a-b;
      });
    },
   
    //冒泡排序
    bubbleSort: function(arr){
      var len=arr.length, tmp;
      for(var i=0;i<len-1;i++){
        for(var j=0;j<len-1-i;j++){
          if(arr[j]>arr[j+1]){
            tmp = arr[j];
            arr[j] = arr[j+1];
            arr[j+1] = tmp;
          }
        }
      }
      return arr;
    },
   
    //快速排序
    quickSort: function(arr){
      var low=0, high=arr.length-1;
      sort(low,high);
      function sort(low, high){
        if(low<high){
          var mid = (function(low, high){
            var tmp = arr[low];
            while(low<high){
              while(low<high&&arr[high]>=tmp){
                high--;
              }
              arr[low] = arr[high];
              while(low<high&&arr[low]<=tmp){
                low++;
              }
              arr[high] = arr[low];
            }
            arr[low] = tmp;
            return low;
          })(low, high);
          sort(low, mid-1);
          sort(mid+1,high);
        }
      }
      return arr;
    },
   
    //插入排序
    insertSort: function(arr){
      var len = arr.length;
      for(var i=1;i<len;i++){
        var tmp = arr[i];
        for(var j=i-1;j>=0;j--){
          if(tmp<arr[j]){
            arr[j+1] = arr[j];
          }else{
            arr[j+1] = tmp;
            break;
          }
        }
      }
      return arr;
    },
   
    //希尔排序
    shellSort: function(arr){
      var h = 1;
      while(h<=arr.length/3){
        h = h*3+1; //O(n^(3/2))by Knuth,1973
      }
      for( ;h>=1;h=Math.floor(h/3)){
        for(var k=0;k<h;k++){
          for(var i=h+k;i<arr.length;i+=h){
            for(var j=i;j>=h&&arr[j]<arr[j-h];j-=h){
              var tmp = arr[j];
              arr[j] = arr[j-h];
              arr[j-h] = tmp;
            }
          }
        }
      }
      return arr;
    }
  }

The above is the entire content of this article, I hope you all like it.

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn