Updating the key within an array of objects

Question

Updating the key within an array of objects

In my array of objects, I have the following data:

arrayOfObject = [{'key1': [1,2]} , {'key2': [1,2,3]} , {'key3': [1,2,4]}]

I know the name of the key that I want to replace in my array :

var keyString = 'key1';

And I also have the new name that this key should be changed to:

var newKey    = 'newKey'

My goal is to transform my array into this format:

arrayOfObject = [{'newKey': [1,2]} , {'key2': [1,2,3]} , {'key3': [1,2,4]}]

To achieve this, I found a helpful resource on JavaScript Object Key Renaming, but I am unsure how to access the object that contains the initial key 'key1' in the array.

Please note that the keyString value will be different each time. Therefore, simply using arrayOfObject[0] won't solve the problem.

Here is the link to the working example on JSFiddle: https://jsfiddle.net/tcatsx6e/

javascript arrays

Answer 1

Answer №1

Here is a potential solution to the problem:

const arrayOfObjects = [{'key1': [1,2]} , {'key2': [1,2,3]} , {'key3': [1,2,4]}];

const keyToFind = 'key1';
const newKeyToAdd = 'newKey';

const updatedArray = arrayOfObjects.map(function(obj) {
  if (keyToFind in obj) {
    let value = obj[keyToFind];
    delete obj[keyToFind];
    obj[newKeyToAdd] = value;
  }
});

You can also view a complete example by visiting this jsbin link.

Answer 2

Here is a potential solution to the problem:

const arrayOfObjects = [{'key1': [1,2]} , {'key2': [1,2,3]} , {'key3': [1,2,4]}];

const keyToFind = 'key1';
const newKeyToAdd = 'newKey';

const updatedArray = arrayOfObjects.map(function(obj) {
  if (keyToFind in obj) {
    let value = obj[keyToFind];
    delete obj[keyToFind];
    obj[newKeyToAdd] = value;
  }
});

You can also view a complete example by visiting this jsbin link.

Answer 3

Answer №2

This function is designed to find the index of the specific object that needs to be modified.

function getIndex(arr, keyString) {
  for (var i = 0; i < arr.length; ++i) {
    if (arr[i][keyString] !== undefined) {
      return i;
    }
  }
}

Answer 4

This function is designed to find the index of the specific object that needs to be modified.

function getIndex(arr, keyString) {
  for (var i = 0; i < arr.length; ++i) {
    if (arr[i][keyString] !== undefined) {
      return i;
    }
  }
}

Updating the key within an array of objects

Answer №1

Answer №2

Similar questions

Removing elements from an array of objects using specific values stored in another array - JavaScript

Performing an API GET request in a header.ejs file using Node.js

Building a matrix-esque table using d3.js reminiscent of HTML tables

Designing a MongoDB document structure that includes subdocuments with similar properties

What is the best way to determine the frequency of each element in a two-dimensional array that has been read from a file?

Exploring ng-view navigation in AngularJS

The xslt code is failing to invoke the JavaScript function

My global variable keeps getting caught by the addEventListener function

Is there a way to simultaneously modify several data variables within a Chart.js label?

Trigger a drop-down list in React when typing a specific character, like {{ or @, in an input field

Adding external JSON data to a plain HTML document can be achieved through the process of

What is the best way to transfer an array from .Net to C?

My goal is to utilize React JS to generate a table by sending the values through props using an array of objects

What is the best method for transmitting additional information to an API?

How can I access the marker's on-screen location in react-native-maps?

Implementing 'Load more...' in Rails for infinite scrolling instead of traditional pagination

How to Convert Irregular Timestamps in Node.js?

I don't understand why this error keeps popping up. It seems that there are several `InputBase` components nested within a

Utilizing the Filter Function to Eliminate an Element from an Array

Random crashes are observed in Selenium tests during the execution of JavaScript code