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

Question

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?

The answer here is perfect. The "already has answers" above is to a 9 year old question and the answers aren't as good as this one. — GoClimbColorado
– GoClimbColorado, Commented Mar 26, 2020 at 0:33

kind user · Accepted Answer · 2020-08-08 18:49:15Z

35

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);

edited Aug 8, 2020 at 18:49

answered Jul 20, 2017 at 18:37

kind user

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2 Comments

Lalit Mohan Over a year ago

Any Idea, how we can update multiple key values at once, Like I need to update the deviceID along enabled

kind user Over a year ago

@LalitMohan Store found object in a variable and then change multiple properties: const obj = arr.find(v => v.deviceID === id); obj.enabled = false; obj.deviceID = 'your ID';

rjz · Accepted Answer · 2017-07-20 18:41:10Z

0

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);
}, []);

answered Jul 20, 2017 at 18:41

rjz

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2 Comments

James Over a year ago

reduce is not really ideal for this type of operation since you're recreating the whole array with one property changed.

Stathis Ntonas Over a year ago

@James can you propose a better solution?

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