Yogesh Chauhan's Blog

The Difference Between Arrays and Objects in JavaScript

in JavaScript on December 8, 2020

In JavaScript,

📌 Arrays use numbered indexes. Objects use named indexes.

The JavaScript Array class is a global object. Read more in details: JavaScript Arrays: A Separate Data Type Or Objects?

Objects can be mutable: What Is Object Mutability In JavaScript?

Arrays can be mutable too because arrays are kind of objects at the end.

When to Use Arrays

JavaScript does not support associative arrays.

You should use arrays when you want the element names to be numbers.

That means, you would want to use arrays when order is the most important factor to organize your data.

When to Use Objects

You should use objects when you want the element names to be strings (text).

Which means, when you care about the label more than indexes, use objects. Making it a nice key value pair.

Most Read

#1 How to add Read More Read Less Button using JavaScript? #2 How to check if radio button is checked or not using JavaScript? #3 Solution to the error “Visual Studio Code can’t be opened because Apple cannot check it for malicious software” #4 Solution to “TypeError: ‘x’ is not iterable” in Angular 9 #5 How to uninstall Cocoapods from the Mac OS? #6 PHP Login System using PDO Part 1: Create User Registration Page

Recently Posted

#Apr 8 JSON.stringify() in JavaScript #Apr 7 Middleware in NextJS #Jan 17 4 advanced ways to search Colleague #Jan 16 Colleague UI Basics: The Search Area #Jan 16 Colleague UI Basics: The Context Area #Jan 16 Colleague UI Basics: Accessing the user interface
You might also like these
How to check if a link has http or https in it in JavaScript?JavaScriptValues and Types Basics in JavaScriptJavaScriptThe Difference Between isNaN() Method And isNaN() Function In JavaScriptJavaScriptHow to link/add CSS file to HTML Document?CSSAdd animation to your skills bar using CSSCSSHow to apply style only to first child and/or only to children other than the first child?CSSMake sure your links have descriptive textUI/UXQuick Introduction to 11 Array Iteration Methods in JavaScriptJavaScriptCROSS JOIN in PostgresPostgresThe SQL EXISTS OperatorSQL/MySQLWordPress Plugin: Things to knowWordPressHow to display modal from bottom to top using CSS and JavaScript?CSS