var data =  [33, 86, 12, 9, 66, 5, 10, 45, 11, 3];
        function sort(data){
          var i=0;
          while(i<data.length-1){
            for(var j=0;j<data.length-i-1;j++){
              if(data[j]>data[j+1]){
                var x=data[j];
                data[j]=data[j+1];
                data[j+1]=x;
              }
            }
            i++;
          }
        }
        sort(data)
        BinarySearch(data,33)
        function BinarySearch(arr, target) {
            let s = 0;
            let e = arr.length - 1;
            let m = Math.floor((s + e) / 2);
            let sortTag = arr[s] <= arr[e];//确定排序顺序

            while (s < e && arr[m] !== target) {
                if (arr[m] > target) {
                    sortTag && (e = m - 1);
                    !sortTag && (s = m + 1);
                } else {
                    !sortTag && (e = m - 1);
                    sortTag && (s = m + 1);
                }
                m = Math.floor((s + e) / 2);
            }

            if (arr[m] == target) {
                console.log('找到了,位置%s', m);
                return m;
            } else {
                console.log('没找到');
                return -1;
            }

        }