如何在 JavaScript 中遍历分组对象

如何解决如何在 JavaScript 中遍历分组对象

我有一组分组对象，但我无法迭代并达到预期的结果。

var cmdLineVal = System.getProperty("java.util.logging.loglevel");
if (cmdLineVal != null) {
    LogManager.getLogManager().updateConfiguration(
        (key) -> (oldVal,newVal) -> {
            if (key.equals(".level")
                    || key.equals(ConsoleHandler.class.getName() + ".level")) {
                return cmdLineVal;
            }
            return newVal;
        }
    );
}

我想消除所有可能的重复项并将所有相似的对象按如下方式分组

[ 000000010: [
  {
    "userId" : "000000010","played" : 10,"lost" : 5,"date" :"2019-04-01T00:00:00.000Z" 
    },{
    "userId" : "000000010","played": 15,"lost" : 0,"date" :"2019-04-02T00:00:00.000Z" 
    },],000000020: [
  {
    "userId" : "000000020","played": 11,"lost" : 4,{
    "userId" : "000000020",]

]

我试过了

    {
    "userId" : "000000010","played": 30,},"played": 26,"lost" : 6,

但它回来了

Object.entries() 

我也试过

[obeject: object]

但我没有定义

解决方法

如果您要对 played 和 lost 字段求和，您应该使用 reduce 来合并对象，对所需字段求和。然后将条目数组转换回对象。

试试这个

const inputData = {
   "000000010":[
      {
         "userId":"000000010","played":10,"lost":5,"date":"2019-04-01T00:00:00.000Z"
      },{
         "userId":"000000010","played":15,"lost":0,"date":"2019-04-02T00:00:00.000Z"
      }
   ],"000000020":[
      {
         "userId":"000000020","played":11,"lost":4,{
         "userId":"000000020","date":"2019-04-02T00:00:00.000Z"
      }
   ]
};


const result = Object.entries(inputData).map(([key,values]) => {
    const merged = values.reduce((accum,x) => { 
        accum.played += x.played; 
        accum.lost += x.lost; 
        return accum; 
    },{"userId": key,"played": 0,"lost": 0});
    return [key,merged];
});

console.log(Object.fromEntries(result));

节点打印以下内容

{
  '000000010': { userId: '000000010',played: 25,lost: 5 },'000000020': { userId: '000000020',played: 26,lost: 4 }
}

,

我已经更正了 json 数据格式并制作了此代码。以下代码不会删除 key date。请告诉我这是否适合您。

function removeDuplicates() {

  // Create an array of objects
  var movies = [{
      "000000010": [{
          "userId": "000000010","played": 10,"lost": 5,"date": "2019-04-01T00:00:00.000Z"
        },{
          "userId": "000000010","played": 15,"lost": 0,"date": "2019-04-02T00:00:00.000Z"
        },]
    },{
      "000000020": [{
          "userId": "000000020","played": 11,"lost": 4,{
          "userId": "000000020",]
    }
  ];

  jsonObject = movies.map(JSON.stringify);
  uniqueSet = new Set(jsonObject);
  uniqueArray = Array.from(uniqueSet).map(JSON.parse);
  console.log(uniqueArray);
}

<p>
  Click on the button to remove the duplicated in the array
</p>

<p>Check the console for the output</p>

<button onclick="removeDuplicates();">
  Click here
</button>