JavaScript Interview Questions: Arrays

JavaScript Interview Questions: Arrays

JavaScript has been the most used programming language for many years now, yet people continue to find it hard to get a grasp of. This article will discuss some of the most frequently asked questions in JavaScript.

JavaScript has been the most used programming language for many years now, yet people continue to find it hard to get a grasp of. This article will discuss some of the most frequently asked questions in JavaScript.

Question

What is the output of the following code?

const arrayOfOddNumbers = [1, 3, 5];
arrayOfOddNumbers[100] = 199;
console.log(arrayOfOddNumbers.length);

Solution

101

The reason for this solution is as follows: JavaScript placesempty as a value for indices 3 - 99. Thus, when you set the value of the 100th index, the array looks like:

Image for post

software-development web-development coding programming javascript

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Offshore Software Development - Best Practices

To make the most out of the benefits of offshore software development, you should understand the crucial factors that affect offshore development.

Software Developer vs Web Developer | Difference Web Developer & Software Developer

Software Developer vs Web Developer | Difference Web Developer & Software Developer | Software development and web development are normally used interchangeably. Although both include development, a software developer has different responsibilities from that of a web developer.

5 Core Criteria for Selecting Software Development Company - TopDevelopers.co

Check out these five criteria for the selection of your software vendor, and you will never regret having the wrong quality product made for you.

Developer Career Path: To Become a Team Lead or Stay a Developer?

For a developer, becoming a team leader can be a trap or open up opportunities for creating software. Two years ago, when I was a developer, ... by Oleg Sklyarov, Fullstack Developer at Skyeng company

7 Wastes In Lean Software Development [And How To Prevent Them]

In the 1930s, the Toyota Production System gave us lean manufacturing principles. Now, the IT, software and web development industry have also adopted these principles to improve their production processes. In actuality, the concepts and principles of Lean are used in more ways than just in manufacturing. Yet, in IT and software, there are still those who are pointing towards Agile development when they mention Lean and software development in the same context. While it is true that Agile and Lean principles share similar philosophies, there are key differences which set them apart. Diving deep inside Lean, I will discuss what lean talks about other than it’s key points.