Find and replace value inside an array of objects javascript [duplicate]

问题

This question already has answers here:

How to change value of object which is inside an array using JavaScript or jQuery? (19 answers)

Closed 2 years ago.

I have an array of objects:

[
 {
    "enabled": true,
    "deviceID": "eI2K-6iUvVw:APA"
},
{
    "enabled": true,
    "deviceID": "e_Fhn7sWzXE:APA"
},
{
    "enabled": true,
    "deviceID": "e65K-6RRvVw:APA"
}]

A POST request is coming in with the deviceID of eI2K-6iUvVw:APA, all i want to do is to iterate the array, find the deviceID and change the enabled value to false.

How's that possible in javascript?

回答1:

You can use Array#find.

let arr = [{
    "enabled": true,
    "deviceID": "eI2K-6iUvVw:APA"
  },
  {
    "enabled": true,
    "deviceID": "e_Fhn7sWzXE:APA"
  },
  {
    "enabled": true,
    "deviceID": "e65K-6RRvVw:APA"
  }
];

const id = 'eI2K-6iUvVw:APA';

arr.find(v => v.deviceID == id).enabled = false;

console.log(arr);

回答2:

You could use Array.reduce to copy the array with the new devices disabled:

const devices = [ /* ... */ ];

const newDevices = devices.reduce((ds, d) => {
  let newD = d;
  if (d.deviceID === 'eI2K-6iUvVw:APA') {
    newD = Object.assign({}, d, { enabled: false });
  }
  return ds.concat(newD);
}, []);

来源：https://stackoverflow.com/questions/45222724/find-and-replace-value-inside-an-array-of-objects-javascript