快速排序.html

<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset=utf-8>
<title></title>
</head>  
<style>  
   
</style>  
    
<body>

    <script>   
      
       function quickSort(arr){
       	  if(arr.length<=1){
       	  	return arr;
       	  }
       	  var num = Math.floor(arr.length/2);//中间位置索引，用做标记
       	  var numValue = arr.splice(num,1);//取出标记位置的值

       	  var left = [];
       	  var right = [];

       	  for(var i =0;i<arr.length;i++){
       	  	if(arr[i]<numValue){
       	  		left.push(arr[i]);
       	  	}else{
       	  		right.push(arr[i]);
       	  	}
       	  }
       	  return quickSort(left).concat([numValue],quickSort(right));
		  
		}

		 var arr = [12,5,37,6,22,40]; 
		 //alert(quickSort(arr));
		 console.log(quickSort(arr));
	   	
    </script>
</body>  
</html>