我正在寻找一种简单的方法来删除重复的对象数组 [重复]答案

【问题标题】：I'm looking for a simple methodology to remove duplicate array of object [duplicate]我正在寻找一种简单的方法来删除重复的对象数组 [重复]
【发布时间】：2021-11-03 07:14:32
【问题描述】：

输入：

const data=[
      { id: 123, name: "dave", age: 23 , address:city:"chennai"},
      { id: 456, name: "chris", age: 23, address:city:"delhi"},
      { id: 789, name: "bob", age: 23, address:city:""},
      { id: 789, name: "bob", age: 23, address:city:"mumbai"},
      { id: 555, name: "dave", age: 23 , address:city:"banglore"}
      { id: 101, name: "tom", age: 23, address:city:"jaipur" },
      { id: 101, name: "tom", age: 23, address:city:" " },
      { id: 102, name: "tim", age: 23, address:city:"kolkata"}
    ]

根据 ID 值我需要删除重复的对象并覆盖地址键值

异常输出：

const data=[
      { id: 123, name: "dave", age: 23 , address:city:"chennai"},
      { id: 456, name: "chris", age: 23, address:city:"delhi"},
      { id: 789, name: "bob", age: 23, address:city:"mumbai"},
      { id: 555, name: "dave", age: 23 , address:city:"banglore"}
      { id: 101, name: "tom", age: 23, address:city:"jaipur" },
      { id: 102, name: "tim", age: 23, address:city:"kolkata"}
    ]

【问题讨论】：

您不想删除重复项，但也想合并。但是也有一些错误，例如address:city:"chennai" 这不是有效的语法。

标签： javascript arrays reactjs object duplicates

【解决方案1】：

我会通过将其转换为字典然后再转换回数组来做到这一点。

const data = [{
    id: 123,
    name: "dave",
    age: 23,
    "address:city": "chennai"
  },
  {
    id: 456,
    name: "chris",
    age: 23,
    "address:city": "delhi"
  },
  {
    id: 789,
    name: "bob",
    age: 23,
    "address:city": ""
  },
  {
    id: 789,
    name: "bob",
    age: 23,
    "address:city": "mumbai"
  },
  {
    id: 555,
    name: "dave",
    age: 23,
    "address:city": "banglore"
  }, {
    id: 101,
    name: "tom",
    age: 23,
    "address:city": "jaipur"
  },
  {
    id: 101,
    name: "tom",
    age: 23,
    "address:city": " "
  },
  {
    id: 102,
    name: "tim",
    age: 23,
    "address:city": "kolkata"
  }
];
const dataObj = {};
data.forEach(d => {
  if (!dataObj[d.id] || d['address:city'].length > dataObj[d.id]['address:city'].length) {
    dataObj[d.id] = d;
  }
});
const dataWithoutDuplicates = Object.values(dataObj);
console.log(dataWithoutDuplicates);

【讨论】：