Map To An Object Javascript

Introduction to javascript map object before es6, we often used an object to emulate a map by mapping a key to a value of any type. Keys must be strings (or symbols) keys can be any datatype: Krunal lathiya is an information technology engineer.

The map object in javascript allows using objects as well as primitive data types (string, symbol, etc.) as a key or value while using it. The callback function () is called on each array element, and the map () method always passes the current element, the index of the current element, and the whole array object to it. Javascript objects vs maps differences between javascript objects and maps:

The map object in javascript allows using objects as well as primitive data types (string, symbol, etc.) as a key or value while using it.

But using an object as a map has some side effects: You have an array of user objects, each one has name, surname and id. In this article, we will learn how to use a javascript array.map () function on an array of objects to perform different types of functionalities like accessing, transforming, deleting, etc. The javascript map method is used to call a function on each element of an array to create a different array based on the outputs of the function.