Update array of objects JavaScript

Use findIndex() method to get index of the object and then use bracket notation to Update array of objects JavaScript.

Update array of objects JavaScript

Simple example code with steps:-

Find the index of the object using findIndex method.
Store the index in variable.
Do a simple update like this: yourArray[indexThatyouFind]

Change name where id is 2.

<!DOCTYPE html>
<html>
<body>

  <script>

   let myArray = [
   {id: 0, name: "Jhon"},
   {id: 1, name: "Sara"},
   {id: 2, name: "Domnic"},
   {id: 3, name: "Bravo"}
   ],

    //Find index of specific object using findIndex method.    
    objIndex = myArray.findIndex((obj => obj.id == 1));

   //Update object's name property.
   myArray[objIndex].name = "Laila"

   console.log(myArray)
 </script>

</body>
</html>

Output:

How to update values of every object in an array JavaScript?

Answer: Use map function with arrow function. Just take the index of the object being iterated over, and look it up in the newData array.

const data = [
  { id: 1, car: "Toyota 2020", owner: "BM" },
  { id: 2, car: "Nissan", owner: "DK" },
  { id: 3, car: "Mazda", owner: "JA" },
  { id: 4, car: "Ford", owner: "DS" }
];
const newData = ["Audi", "Bentley", "BMW", "Buick"];

const newCars = data.map((obj, i) => ({ ...obj, car: newData[i] }));
console.log(newCars);

Output:

[
  {
    "id": 1,
    "car": "Audi",
    "owner": "BM"
  },
  {
    "id": 2,
    "car": "Bentley",
    "owner": "DK"
  },
  {
    "id": 3,
    "car": "BMW",
    "owner": "JA"
  },
  {
    "id": 4,
    "car": "Buick",
    "owner": "DS"
  }
]

Source: stackoverflow.com/

Do comment if you have any doubts or suggestions on this JS object topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version

Rohit

Degree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical.

Update array of objects JavaScript | Example code