JavaScript Maps Tutorial | Maps In JavaScript | JavaScript Map Explained | JavaScript | Simplilearn

This JavaScript maps tutorial will give you an introduction to the concept of Maps in JavaScript. In this video, JavaScript Maps are explained with suitable examples. This video on maps in javascript will help you understand how key-value pairs work in javascript with the help of the map function.
In addition, you will also understand all the map functions that one can apply to the data.
Below are the points we are going to discuss in this JavaScript tutorial for beginners.

Introduction
What is an Object?
Difference between objects and maps.
Methods present within Maps

Introduction to JavaScript

JavaScript is a scripting language that is used to create and manage dynamic web pages, basically anything that moves on your screen without requiring you to refresh your browser. It can be anything from animated graphics to an automatically generated Facebook timeline. When most people get interested in web development, they start with good old HTML and CSS. From there, they move on to JavaScript, which makes sense, because, these three elements together form the backbone of web development. HTML is the structure of your page like the headers, the body text, any images you want to include. It basically defines the contents of a web page. CSS controls how that page looks (it’s what you’ll use to customize fonts, background colors, etc.). JavaScript is the third element. Once you’ve created your structure (HTML) and your aesthetic vibe (CSS), JavaScript makes your site dynamic (automatically updateable).

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[david-]

I think it'd be great if you could explain when we should use map instead of object or array.