Book Image

Learning JavaScript Data Structures and Algorithms - Third Edition

Book Image

Learning JavaScript Data Structures and Algorithms - Third Edition

Overview of this book

A data structure is a particular way of organizing data in a computer to utilize resources efficiently. Data structures and algorithms are the base of every solution to any programming problem. With this book, you will learn to write complex and powerful code using the latest ES 2017 features. Learning JavaScript Data Structures and Algorithms begins by covering the basics of JavaScript and introduces you to ECMAScript 2017, before gradually moving on to the most important data structures such as arrays, queues, stacks, and linked lists. You will gain in-depth knowledge of how hash tables and set data structures function as well as how trees and hash maps can be used to search files in an HD or represent a database. This book serves as a route to take you deeper into JavaScript. You’ll also get a greater understanding of why and how graphs, one of the most complex data structures, are largely used in GPS navigation systems in social networks. Toward the end of the book, you’ll discover how all the theories presented in this book can be applied to solve real-world problems while working on your own computer networks and Facebook searches.
Table of Contents (22 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

The TypedArray class


We can store any datatype in JavaScript arrays. This is because JavaScript arrays are not strongly typed as in other languages such as C and Java.

TypedArray was created so that we could work with arrays with a single datatype. Its syntax is let myArray = new TypedArray(length), where TypedArray needs to be replaced with one TypedArray class, as specified in the following table:

TypedArray

Description

Int8Array

8-bit two's complement signed integer

Uint8Array

8-bit unsigned integer

Uint8ClampedArray

8-bit unsigned integer

Int16Array

16-bit two's complement signed integer

Uint16Array

16-bit unsigned integer

Int32Array

32-bit two's complement signed integer

Uint32Array

32-bit unsigned integer

Float32Array

32-bit IEEE floating point number

Float64Array

64-bit IEEE floating point number

 

The following is an example:

let length = 5; 
let int16 = new Int16Array(length); 
 
let array16 = [];  
array16.length = length; 
 
for (let i=0; i<length; i++){  
int16[i] = i+1; 
} 
console.log(int16); 

Typed...