Book Image

Object-Oriented JavaScript - Third Edition

By : Ved Antani, Stoyan STEFANOV
5 (1)
Book Image

Object-Oriented JavaScript - Third Edition

5 (1)
By: Ved Antani, Stoyan STEFANOV

Overview of this book

JavaScript is an object-oriented programming language that is used for website development. Web pages developed today currently follow a paradigm that has three clearly distinguishable parts: content (HTML), presentation (CSS), and behavior (JavaScript). JavaScript is one important pillar in this paradigm, and is responsible for the running of the web pages. This book will take your JavaScript skills to a new level of sophistication and get you prepared for your journey through professional web development. Updated for ES6, this book covers everything you will need to unleash the power of object-oriented programming in JavaScript while building professional web applications. The book begins with the basics of object-oriented programming in JavaScript and then gradually progresses to cover functions, objects, and prototypes, and how these concepts can be used to make your programs cleaner, more maintainable, faster, and compatible with other programs/libraries. By the end of the book, you will have learned how to incorporate object-oriented programming in your web development workflow to build professional JavaScript applications.
Table of Contents (25 chapters)
Object-Oriented JavaScript - Third Edition
About the Authors
About the Reviewer
Customer Feedback
Built-in Functions
Regular Expressions

ES6 array methods

Arrays get a bunch of useful methods. Libraries such as lodash and underscore provided features missing in the language so far. With the new helper methods, array creation and manipulation is much more functional and easy to code.


Converting array-like values to arrays has always been a bit of a challenge in JavaScript. People have employed several hacks and written libraries to just let you handle arrays effectively.

ES6 introduces a very helpful method to convert array-like objects and iterable values into arrays. Array-like values are objects that have a length property and indexed elements. Every function has an implicit arguments variable that contains a list of all arguments passed to the function. This variable is an array-like object. Before ES6, the only way we could convert the arguments object to an array was to iterate through it and copy the values over to a new array:

    function toArray(args) { 
        var result = []; 
        for (var...