如何删除对象数组中的两个重复值

Question

我有以下代码用于删除重复记录。它显示了唯一的值，并删除了最后的重复记录。但是，我想要的是，如果两本护照相同，则从数组中删除这两个元素。

示例

var array = [{
    "PassportNo": "abced",
    "Name": "John"
  },
  {
    "PassportNo": "abcederrr",
    "Name": "Johnss",

  },
  {
    "PassportNo": "abced",
    "Name": "John"

  }
];


function removeDuplicates(originalArray, objKey) {
  var trimmedArray = [];
  var values = [];
  var value;

  for (var i = 0; i < originalArray.length; i++) {
    value = originalArray[i][objKey];

    if (values.indexOf(value) === -1) {
      trimmedArray.push(originalArray[i]);
      values.push(value);
    }
  }
  return trimmedArray;
}

var noDuplicates = removeDuplicates(array, 'PassportNo');
console.log(noDuplicates);
/*
[
  {
    "PassportNo": "abced",
    "Name": "John"
  },
  {
    "PassportNo": "abcederrr",
    "Name": "Johnss"
  }
]
*/

我想要这样（删除两个值）：

[{
  "PassportNo": "abcederrr",
  "Name": "Johnss"
}]

Answer 1

在将计数存储在单独的对象中后，您可以使用简单的filter进行此操作（即，仅选择计数为1的护照）。

var array = [{
    "PassportNo": "abced",
    "Name": "John"
  },
  {
    "PassportNo": "abcederrr",
    "Name": "Johnss",
  },
  {
    "PassportNo": "abced",
    "Name": "John"
  }
];

var passportCounts = array.reduce((map, curr) => {
  if (curr.PassportNo in map) map[curr.PassportNo] += 1;
  else map[curr.PassportNo] = 1;
  return map;
}, {});

console.log(array.filter(p => passportCounts[p.PassportNo] === 1));