JS———快速排序

function sorts(arr){

                     if(arr.length<=1){

return arr

}

var num=Math.floor(arr.length/2);var numValue=arr.splice(num,1);

var numValue=arr.splice(num,1);

var left=[ ];

var right=[ ]

for(var i=0;i<arr.length;i++){

      if(arr[i]>numValue)   { 

       right.push(arr[i])

}else{

                    left.push(arr[i])

     }

}

return sorts(left).concat(numValue,sorts(right))

}