[ { "id": 12, "created_at": "2023-05-31T04:12:56.000Z", "updated_at": "2023-06-11T23:48:02.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710no22", "pointId": "710no22", "pointName": "710二氧化氮2", "value": "1" } ]JavaScript中只留下value

你可以使用map()方法和解构赋值来实现这个问题的需求，例如：

const arr = [
  {
    "id": 12,
    "created_at": "2023-05-31T04:12:56.000Z",
    "updated_at": "2023-06-11T23:48:02.000Z",
    "gatewayMac": "e491127eaa15",
    "deviceId": "710no22",
    "pointId": "710no22",
    "pointName": "710二氧化氮2",
    "value": "1"
  }
];

const values = arr.map(({ value }) => value);
console.log(values); // ["1"]

这里我们使用了解构赋值来获取每个对象中的value属性，并且使用map()方法将所有的value属性值提取出来组成一个新的数组。

相关问题

}, { "id": 8, "created_at": "2023-05-31T04:01:11.000Z", "updated_at": "2023-05-31T04:01:11.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710co", "pointId": "710co1", "pointName": "710一氧化碳1", "value": "0" }, { "id": 9, "created_at": "2023-05-31T04:10:34.000Z", "updated_at": "2023-05-31T04:10:34.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710no2", "pointId": "710no2", "pointName": "710二氧化氮", "value": "4" }, { "id": 10, "created_at": "2023-05-31T04:11:36.000Z", "updated_at": "2023-05-31T04:11:36.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710co2", "pointId": "710co2", "pointName": "710一样化碳2", "value": "0" }, { "id": 11, "created_at": "2023-05-31T04:12:08.000Z", "updated_at": "2023-05-31T05:19:39.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710o22", "pointId": "710o22", "pointName": "710氧气2", "value": "205" }, {

I'm sorry, but your question is incomplete. It looks like you copied and pasted some code related to device readings from a database. Can you please provide a complete question or clarify what you would like me to help you with?