Understanding Data Structures in JavaScript (Linked Lists)

Understanding Data Structures in JavaScript (Linked Lists)

In this article, we will discuss how a linked list gets stored in the database and, we will implement a linked-list from scratch with operations like the addition and deletion of an element, lookups, and reversing a linked-list.

Understanding Linked Lists can be a difficult task when you are a beginner JavaScript developer since JavaScript does not provide built-in Linked List support. In an advanced language like JavaScript, we need to implement this data structure by scratch and, if you are unfamiliar with how this data structure works, the implementation part becomes that much more difficult.

In this article, we will discuss how a linked list gets stored in the database and, we will implement a linked-list from scratch with operations like the addition and deletion of an element, lookups, and reversing a linked-list. Before moving onto implementing a linked-list, one needs to understand what are the advantages of using a linked-list when we already have data structures like arrays and objects present.

We know that elements inside an array get stored in the database with numbered indexes and, in sequential order:

Arrays in memoryArrays in memory

While using arrays, operations like adding/deleting elements at the start or at a specific index can be a slow task since we have to shift indexes of all the other elements. This slowness is caused due to the numbered indexes feature of arrays.

The above problem can get solved with the use of objects. Since in objects, the elements get stored at random positions and therefore, there is no need to shift indexes of elements while performing the operations like adding/deleting elements at the start or specific index:

Objects in memory

beginners 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

JavaScript Game Tutorial for Beginners

In this JavaScript game tutorial for beginners I will take you step by step though a complete game development process. We will improve our front end web development coding skills and learn about ES6 syntax, event listeners, how to control CSS styles and classes with JavaScript, what's the difference between setTimeout and setInterval, how to use clearInterval, difference between const and let variables and between regular JavaScript functions and ES6 arrow functions and much more.

JavaScript Guide For Beginners

Making JavaScript to be learned within a week. It can be difficult when you start learning a new language if you’re a beginner in programming. Here, I’ll give you a guide for learning JavaScript.

The essential JavaScript concepts that you should understand

The essential JavaScript concepts that you should understand - For successful developing and to pass a work interview

JavaScript: Var, Let, or Const?

Variables in JavaScript are a bit weird. They are awesome things that hold our data and they all kind of do it in a similar but important and different way. These data containers we are talking about are var, let, and const.

JavaScript Arrays: A Quick Overview for Beginners 

I am very fortunate and honored to be part of LinkedIn Learning’s instructor team, and in January 2021 my first course will be released on their platform: JavaScript Array Methods.