Question

我有json文件如下：

[
  {"TYPE": "A", "STATUS": "SUCCESS", "DISCOUNT": 500.00, "TOTAL": 5000.00},
  {"TYPE": "A", "STATUS": "SUCCESS", "DISCOUNT": 300.00, "TOTAL": 1266.00},
  {"TYPE": "A", "STATUS": "FAIL", "DISCOUNT": 300.00, "TOTAL": 515.00},
  {"TYPE": "B", "STATUS": "SUCCESS", "DISCOUNT": 323, "TOTAL": 846.00},
  {"TYPE": "B", "STATUS": "FAIL", "DISCOUNT": 80.00, "TOTAL": 3000.00},
  {"TYPE": "B", "STATUS": "KIV", "DISCOUNT": 105, "TOTAL": 900.00},
  {"TYPE": "C", "STATUS": "KIV", "DISCOUNT": 245.00, "TOTAL": 998.75},
  {"TYPE": "B", "STATUS": "SUCCESS", "DISCOUNT": 234.00, "TOTAL": 3500.00},
  {"TYPE": "C", "STATUS": "SUCCESS", "DISCOUNT": 201, "TOTAL": 5008.00},
  {"TYPE": "C", "STATUS": "FAIL", "DISCOUNT": 712, "TOTAL": 12300.00},
  {"TYPE": "A", "STATUS": "SUCCESS", "DISCOUNT": 500.00, "TOTAL": 5000.00},
  {"TYPE": "D", "STATUS": "SUCCESS", "DISCOUNT": 300.00, "TOTAL": 1266.00},
  {"TYPE": "D", "STATUS": "FAIL", "DISCOUNT": 300.00, "TOTAL": 515.00},
  {"TYPE": "D", "STATUS": "SUCCESS", "DISCOUNT": 323, "TOTAL": 846.00},
  {"TYPE": "B", "STATUS": "FAIL", "DISCOUNT": 80.00, "TOTAL": 3000.00},
  {"TYPE": "B", "STATUS": "KIV", "DISCOUNT": 105, "TOTAL": 900.00},
  {"TYPE": "C", "STATUS": "KIV", "DISCOUNT": 245.00, "TOTAL": 998.75},
  {"TYPE": "B", "STATUS": "SUCCESS", "DISCOUNT": 234.00, "TOTAL": 3500.00},
  {"TYPE": "C", "STATUS": "KIV", "DISCOUNT": 201, "TOTAL": 5008.00},
  {"TYPE": "C", "STATUS": "SUCCESS", "DISCOUNT": 712, "TOTAL": 12300.00} 
]

如何制作：

状态数组
总计数组（每个状态的总和）
每个状态的数组编号

示例（预期结果）：

1）状态 [“成功”，“失败”，“KIV”]

2）总计 [199000.00,12000.00,6000.00]

3）每种类型的每种状态的数量，例如：

[{A:[{SUCCESS: 2},
     {FAIL: 1}]
}, 
 {B:[{SUCCESS:2},
     {FAIL:1},
     {KIV:1}]
}]

我已经尝试了自己的方式和它的作品（除了没有3）但我想知道它是否可以成为另一种方式更简单。以下是我的步骤：

      var arrStatus=[];
      var countStatus=[];
      var flagStatus="";

      var arrTotal=[];

      for (var i = 0; i < data.length; i++) {
          var tempStatus = data[i].STATUS;

          flagStatus= false;

          for(var z = 0; z< arrStatus.length; z++){
            if(tempStatus == arrStatus[z]){

              arrTotal[z] += data[i].TOTAL;
              countStatus[z]++;
              flagStatus = true;

            }
          }              

          if(flagStatus == false){
            countStatus.push(1);
            arrStatus.push(tempStatus);
            arrTotal.push(data[i].TOTAL);
          }
      }

感谢您的帮助

Answer 1

这是一种算法。创建一个地图。键是STATUS值。该值是类型为jsonData（您创建的类）的对象，它具有两个属性：count和total。迭代你的json数据。如果遇到新状态，请创建JsonData类型的新实例并相应地设置其值（例如，count = 1，total = 5000）。如果您遇到已经看到的状态，请将计数增加1，将总计增加新总数（例如，第二次看到SUCCESS条目时计数++和总计=总计+ 1266）。

Answer 2

那里不是最好的解决方案，但它确实有效！

function getUnique(array, item) {
  var items = [];
  for (var i = 0, len = array.length; i < len; i++) {
    for (var key in array[i]) {
      if (key === item) {
        items.push(array[i][key]);
      }
    }
  }
  return eliminateDuplicates(items);
}

function eliminateDuplicates(arr) {
  var i,
    len = arr.length,
    out = [],
    obj = {};

  for (i = 0; i < len; i++) {
    obj[arr[i]] = 0;
  }
  for (i in obj) {
    out.push(i);
  }
  return out;
}
var uniqueStatus = getUnique(data, "STATUS");
console.log(uniqueStatus);

输出：[ 'SUCCESS', 'FAIL', 'KIV' ]

function getTotal(array, item) {
  var sum = 0;
  for (var i = 0, len = array.length; i < len; i++) {
    for (var key in array[i]) {
      if (array[i][key] === item) {
        sum += array[i]["TOTAL"];
      }
    }
  }
  return sum;
}
var total = [getTotal(data, "SUCCESS"), getTotal(data, "FAIL"), getTotal(data, "KIV")];
console.log(total);

输出：[ 38532, 19330, 8805.5 ]

var uniqueType = getUnique(data, "TYPE");
console.log(uniqueType);

输出：[ 'A', 'B', 'C', 'D' ]

function makeObject(array, type, status) {
  var count = 0;
  for (var i = 0, len = array.length; i < len; i++) {
    if (array[i]["TYPE"] === type && array[i]["STATUS"] === status) {
      count++;
    }
  }
  return count;
}

console.log(makeObject(data, "B", "SUCCESS"));

输出：3

为json数据创建新数组

2 个答案: