javascript - 如何通过group by json数据制作json树？

Question

请看一下我当前的 json。

[ 
 {"mode": "AR","fname": "ta","lname":"da","w_lng":"2.xx","w_lat":"1.xx"....},
 {"mode": "AR","fname": "ta","lname":"da","w_lng":"3.xx","w_lat": "4.xx"....},
 {"mode": "AR","fname": "ka","lname":"ja","w_lng":"6.xx","w_lat": "5.xx"....}
]

现在我正在寻找:

{
"mode": "AR",
"results": [
        {
        "fname": "ta",
        "lname": "da",
        "w_level": [
                    { "w_lng": "2.xx",
                      "w_lat": "1.xx"
                      "anothelevel":[........]
                    },
                    {"w_lng": "3.xx",
                     "w_lat": "4.xx"
                     "anothelevel":[........]
                    }
                  ]  
       }
       {
        "fname": "ka",
        "lname": "ja",
        "w_level": [
            {
                "w_lng": "x.xx",
                "w_lat": "x.xx"
                .....................
                    }
                  ]  
       }
     ]
  }

这与我们在 SQL group by 中所做的相同。假设首先按世界分组，然后按国家分组，然后按城市分组，然后按村庄分组等。我通过分组进行了尝试。但结果不是我预期的输出。请建议我应该做什么。

Answer 1

objMap = {};
for (let temp of obj) {
  if (!objMap[temp.mode]) {
    objMap[temp.mode] = { mode: temp.mode, results: [] }
  }
  let tempObj = { w_level: [], fname: temp.fname, lname: temp.lname };
  let w_level = {};
  for (let key of Object.keys(temp)) {
    if (key !== "fname" && key !== 'lname' && key !== 'mode') {

      w_level[key] = temp[key];

    }


  }
  tempObj.w_level.push(w_level)
  objMap[temp.mode].results.push(tempObj)
}


NOTE:get object by using Object.values(objMap);