Question

我有一个像这样的JSON对象

 var response = [{"2017-04-19T18:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"}},{"2017-04-20T15:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"15:00:12"}}]

我想把它转换成这样的东西

[{"2017-04-19":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"}},{"2017-04-20":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"15:00:12"}}]

我试过这个

for(var key in response){
    if(response.hasOwnProperty(key)){
        key = key.substring(0,10);
    }
}

但这不起作用。我哪里错了？

快速修改：目前的答案似乎有效，但有些对象具有相同的日期但时间不同。因此，输出仅显示特定时间的数据。有什么办法可以解决这个问题。例如：

var response = [{"2017-04-19T18:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"}},{"2017-04-19T15:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"15:00:12"}}]

我希望将此输出为类似

的内容

[{"2017-04-19":[{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"},{"2017-04-19T15:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"15:00:12"}]}]

Answer 1

在您的情况下，问题是您指的是response，它是一个对象数组。但是你需要response[0]从第0个索引获取元素

＆＃13;

var response = [{
  "2017-04-19T18:00:12+05:30": {
    "command": "00",
    "device_id": "THB1",
    "voltage": "229",
    "e1": "00.00",
    "date_time": "18:00:12"
  }
}]

for (var key in response[0]) {
  if (response[0].hasOwnProperty(key)) {
   // creating substring from key name
    var x = key.substring(0, 10);
    // in same object creating a new key & value using the 
    // substring and previous value
    response[0][x] = response[0][key]
    // deleting the old key
    delete response[0][key];
  }
}
console.log(response)

＆＃13;

Answer 2

试试这个，这应该可以解决你的问题

      var response = [{"2017-04-19T18:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"}},{"2017-04-19T17:00:16+05:30":{"command":"008550","device_id": "THUGHGB1", "voltage": "229", "e1": "00.00", "date_time":"18:00:12"}},{"2017-04-20T15:00:12+05:30":{"command":"00","device_id": "THB1", "voltage": "229", "e1": "00.00", "date_time":"15:00:12"}}]

                         var newResponse = [];
      for (var i = 0; i < response.length; i++) {
          for (var key in response[i]) {
              var newKey = key.substring(0, 10);

              var newObj = {};
              if (newResponse.length) {
                  for (var j = 0; j < newResponse.length; j++) {
                      for (var newIdx in newResponse[j]) {
                          if (newIdx === newKey) {
                              newObj[key] = response[i][key];
                          } else {
                              newObj[newKey] = response[key]
                          }
                      }
                  }
              } else {
                  newObj[newKey] = response[key]
              }
              newResponse.push(newObj)
          }
      }
response = newResponse;

如何在javascript对象中修剪Key的大小

2 个答案: