To get the most out of this book

• Basic knowledge of JavaScript, HTML, and CSS
• Have Node.js installed (https://nodejs.org/en/download/)
• Install WebStorm IDE (https://www.jetbrains.com/webstorm/download) or similar
• A next-generation browser such as Google Chrome (https://www.google.com/chrome/browser/desktop/)
• Familiarity with Angular 2.0 or greater is a plus but is not required
• The screenshots in this book are taken on a macOS. There would be little difference (if any) for users of any other OS. The code samples, however, would run without any discrepancies irrespective of the OS. Anywhere we have CMD/cmd/command specified, please use CTRL/ctrl/control key on the windows counterpart. If you see return, please use Enter and if you see the term terminal/Terminal please use its equivalent command prompt on windows. 
• In this book, the code base is built incrementally as the topic progresses. So, when you compare the beginning of a code sample with the code base in GitHub, be aware that the GitHub code is the final form of the topic or the example that you are referring to.

Download the example code files

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packtpub.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Practical-JavaScript-Data-Structures-and-Algorithms. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here:
https://www.packtpub.com/sites/default/files/downloads/HandsOnDataStructuresandAlgorithmswithJavaScript_ColorImages.pdf.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The native array operations have varying time complexities. Let's take Array.prototype.splice and Array.prototype.push."

A block of code is set as follows:

class Stack {
    constructor() {
    
    }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

var express = require('express');
var app = express();
var data = require('./books.json');
var Insertion = require('./sort/insertion');

Any command-line input or output is written as follows:

ng new back-button

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "When the user clicks on the back button, we will navigate to the previous state of the application from the stack."

Warnings or important notes appear like this.

Tips and tricks appear like this.