How to use Object.fromEntries() and Object.entries() In Javascript

Q: How to use Object.fromEntries() and Object.entries() In Javascript

The Object.entries() will be used to convert the object into an array of key-value pairs. Then, we use Array.filter() to exclude the key-value pair with the specified key. Finally, we use Object.fromEntries() to convert the filtered array back into an object.

4. Using Object.assign()

6. Using _.omit method of Underscore.js library to remove a key from object

The Object.entries() will be used to convert the object into an array of key-value pairs. Then, we use Array.filter() to exclude the key-value pair with the specified key. Finally, we use Object.fromEntries() to convert the filtered array back into an object.

Example:

The below code implements the above methods to remove key from an object in JavaScript.

Javascript

const details = {
    name: 'Alex',
    age: 30,
    country: 'Canada'
};
const { age, ...rest } = Object.fromEntries(
    Object.entries(details).filter(([key]) =>
        key !== 'age'));
console.log(rest);

Output

{ name: 'Alex', country: 'Canada' }

Explanation:

Object.entries(details) converts the details object into an array of key-value pairs.
.filter(([key]) => key !== 'age') filters out the key-value pairs where the key is not equal to ‘age’, effectively removing the “age” property.
Object.fromEntries() converts the filtered array of key-value pairs back into an object.
Finally, object destructuring is used to extract the “age” property from the result, which is assigned to the age variable, while the rest of the properties are collected into a new object called rest.
The rest object is then logged to the console, showing the object without the “age” property.

How to remove a key-value pair from JavaScript object?

JavaScript object is a powerful data structure that combines keys and values. Sometimes, we need to delete a specific key-value from an object. It can be done using the approaches given below.

How to remove a key-value from JavaScript object ?

There are several methods that can be used to remove a key from a JavaScript object:

Table of Content

Using the reduce() and filter() methods
Using the delete operator
Destructuring with the Rest Operator
Using Object.assign()
Using Object.fromEntries() and Object.entries()
Using _.omit method of Underscore.js library
UseCase of Remove a key from JavaScript object

How to use Object.fromEntries() and Object.entries() In Javascript

Explanation:

How to remove a key-value pair from JavaScript object?

Similar Reads