Question

我有一个包含对象的数组。我需要检查每个具有特定键值的对象，并删除具有相同值的对象..

 var data = [  
   {  
      "XPOS":0,
      "VALUE":0.14,
      "USERID":"46473",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":1,
      "VALUE":0.39,
      "USERID":"46477",
      "MORE_USER_COUNT":2
   },
   {  
      "XPOS":1,
      "VALUE":0.39,
      "USERID":"46475",
      "MORE_USER_COUNT":2
   },
   {  
      "XPOS":1,
      "VALUE":0.39,
      "USERID":"46479",
      "MORE_USER_COUNT":2
   },
   {  
      "XPOS":0,
      "VALUE":0.94,
      "USERID":"46471",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":0,
      "VALUE":2.42,
      "USERID":"46474",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":0,
      "VALUE":4.78,
      "USERID":"46472",
      "MORE_USER_COUNT":1
   }
]

我需要以下格式

var outdata = [  
   {  
      "XPOS":0,
      "VALUE":0.14,
      "USERID":"46473",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":1,
      "VALUE":0.39,
      "USERID":"46477",
      "MORE_USER_COUNT":2
   },
   {  
      "XPOS":0,
      "VALUE":0.94,
      "USERID":"46471",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":0,
      "VALUE":2.42,
      "USERID":"46474",
      "MORE_USER_COUNT":1
   },
   {  
      "XPOS":0,
      "VALUE":4.78,
      "USERID":"46472",
      "MORE_USER_COUNT":1
   }
]

Answer 1

＆＃13;

var arrData = [
    {
        "XPOS": 0,
        "VALUE": 0.14,
        "USERID": "46473",
        "MORE_USER_COUNT": 1
    },
    {
        "XPOS": 1,
        "VALUE": 0.39,
        "USERID": "46477",
        "MORE_USER_COUNT": 2
    },
    {
        "XPOS": 1,
        "VALUE": 0.39,
        "USERID": "46475",
        "MORE_USER_COUNT": 2
    },
    {
        "XPOS": 1,
        "VALUE": 0.39,
        "USERID": "46479",
        "MORE_USER_COUNT": 2
    },
    {
        "XPOS": 0,
        "VALUE": 0.94,
        "USERID": "46471",
        "MORE_USER_COUNT": 1
    },
    {
        "XPOS": 0,
        "VALUE": 2.42,
        "USERID": "46474",
        "MORE_USER_COUNT": 1
    },
    {
        "XPOS": 0,
        "VALUE": 4.78,
        "USERID": "46472",
        "MORE_USER_COUNT": 1
    }
];
document.getElementById("real_data").appendChild(document.createTextNode(JSON.stringify(arrData, null, "\t")));

// FUNCTION TO REMOVE DUPLICATE ELEMENT BASED ON KEY
function removeDuplicate() {
    arrData.forEach(function (objElement1, intIndex1) {
        arrData.forEach(function (objElement2, intIndex2) {
            if (intIndex1 !== intIndex2 && objElement1.XPOS === objElement2.XPOS && objElement1.VALUE === objElement2.VALUE)
            {
                // REMOVE ARRAY ELEMENT
                arrData.splice(intIndex2, 1);
            }
        });
    });
}
removeDuplicate() ;


document.getElementById("expected_data").innerHTML = "";
document.getElementById("expected_data").appendChild(document.createTextNode(JSON.stringify(arrData, null, 4)));

＆＃13;

#real_data,
#expected_data {
    white-space: pre;
    font-family: monospace;
    font-size: 12px;
}

＆＃13;

<body>
  <div id="real_data"></div>
  <hr/>
  <div id="expected_data"></div>
</body>

＆＃13;

Answer 2

您似乎正在尝试从数据数组中删除具有重复＆＃34; VALUE＆＃34;的对象。值。如果是这种情况，您应该能够创建临时数组，并且如果临时数组中已经存在匹配，则将对象从原始数组推送到临时数组。

问题在于找出哪个具有您想要保留的重复值的对象。目前尚不清楚标准是什么。

var original_values = [{
  "XPOS": 0,
  "VALUE": 0.14,
  "USERID": "46473",
  "MORE_USER_COUNT": 1
}, {
  "XPOS": 1,
  "VALUE": 0.39,
  "USERID": "46477",
  "MORE_USER_COUNT": 2
}, {
  "XPOS": 1,
  "VALUE": 0.39,
  "USERID": "46475",
  "MORE_USER_COUNT": 2
}, {
  "XPOS": 1,
  "VALUE": 0.39,
  "USERID": "46479",
  "MORE_USER_COUNT": 2
}, {
  "XPOS": 0,
  "VALUE": 0.94,
  "USERID": "46471",
  "MORE_USER_COUNT": 1
}, {
  "XPOS": 0,
  "VALUE": 2.42,
  "USERID": "46474",
  "MORE_USER_COUNT": 1
}, {
  "XPOS": 0,
  "VALUE": 4.78,
  "USERID": "46472",
  "MORE_USER_COUNT": 1
}];

var pruned_values = [];

function pruneArray(array, searchKey) {
  for (var i = 0; i < array.length; i++) {
    var theValue = array[i][searchKey];
    if (!checkForDuplicates(pruned_values, searchKey, theValue)) {
      pruned_values.push(array[i]);
    }
  }
  original_values = pruned_values;
}

function checkForDuplicates(array, searchKey, searchValue) {
  var foundDuplicate = false;
  for (var i = 0; i < array.length; i++) {
    if (array[i][searchKey] === searchValue) {
      foundDuplicate = true;
    }
  }
  return foundDuplicate;
}

pruneArray(original_values, "VALUE");

通过检查特定键从数组中删除重复元素

2 个答案: