Question

我有一个对象数组。我正在尝试从数组中筛选出一些对象，并使用以下内容获取新的数组。

[
  {
    "userId": 1,
    "title": "title 1",
    "body": "Body for user 1",
    "address": {
      "country": "Germany",
      "state": "State1"
    },
    "phone": 1234
  },
  {
    "userId": 2,
    "title": "title 2",
    "body": "Body for user 2",
    "address": {
      "country": "Canada",
      "state": "State2"
    },
    "phone": 4321
  }
]

我如何过滤数组并获得没有address和phone的新数组。任何帮助表示赞赏。谢谢

Answer 1

您可以使用.map()和对象分解：

let data = [
    {"userId": 1, "title": "title 1", "body": "Body for user 1", "address": {"country": "Germany", "state": "State1"}, "phone": 1234},
    {"userId": 2, "title": "title 2", "body": "Body for user 2", "address": { "country": "Canada", "state": "State2"}, "phone": 4321}
];

let result = data.map(({address, phone, ...rest}) => rest);

console.log(result);

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文档：

Answer 2

您可以使用.map方法来创建新的过滤数组。

map()方法创建一个新数组，其结果是在调用数组中的每个元素上调用提供的函数

您可以使用destructuring assignment来获取并返回要保留的属性：

data.map(({userId, title, body}) => {
  return {userId, title, body}
});

这是一个演示：

const data = [
  {
    "userId": 1,
    "title": "title 1",
    "body": "Body for user 1",
    "address": {
      "country": "Germany",
      "state": "State1"
    },
    "phone": 1234
  },
  {
    "userId": 2,
    "title": "title 2",
    "body": "Body for user 2",
    "address": {
      "country": "Canada",
      "state": "State2"
    },
    "phone": 4321
  }
];

let res = [];
res = data.map(({userId, title, body}) => {
  return {userId, title, body}
});

console.log(res)

Answer 3

您还可以使用reduce

let res = Object.values(data.reduce((c, {userId,title,body}) => {
      c[userId] = c[userId] || {userId, title, body}
      return c;
 }, {}));

从对象数组中过滤一些对象

3 个答案: