js 判断数组重复元素以及重复的个数

    var arr  = '01,08,16,27,34,04,11,19,25,32,03,18,19,26,34,01,05,07,22,25,03,05,13'
    arr = arr.split(',').sort();　　//先将获得的数据进行排序; var newArr = []; // 
 for (var i = 0; i < arr.length;) { var count = 0; for (var j = i; j < arr.length; j++) { if (arr[i] == arr[j]) { count++; } } newArr.push({ 'Number': arr[i], 'count':count }); i += count }

结果以下:

 

鉴于方便观察，将数据根据count进行排序;

    function bubbleSort(arr) {
      var len = arr.length;
      for (var i = 0; i < len; i++) {
        for (var j = 0; j < len - 1 - i; j++) {
          if (arr[j].count > arr[j + 1].count) { //相邻元素两两对比
            var temp = arr[j + 1]; //元素交换
            arr[j + 1] = arr[j];
            arr[j] = temp;
          }
        }
      }
      return arr;
    }

获得结果：