Book Image

Learn ECMAScript - Second Edition

By : MEHUL MOHAN, Narayan Prusty
Book Image

Learn ECMAScript - Second Edition

By: MEHUL MOHAN, Narayan Prusty

Overview of this book

Learn ECMAScript explores implementation of the latest ECMAScript features to add to your developer toolbox, helping you to progress to an advanced level. Learn to add 1 to a variable andsafely access shared memory data within multiple threads to avoid race conditions. You’ll start the book by building on your existing knowledge of JavaScript, covering performing arithmetic operations, using arrow functions and dealing with closures. Next, you will grasp the most commonly used ECMAScript skills such as reflection, proxies, and classes. Furthermore, you’ll learn modularizing the JS code base, implementing JS on the web and how the modern HTML5 + JS APIs provide power to developers on the web. Finally, you will learn the deeper parts of the language, which include making JavaScript multithreaded with dedicated and shared web workers, memory management, shared memory, and atomics. It doesn’t end here; this book is 100% compatible with ES.Next. By the end of this book, you'll have fully mastered all the features of ECMAScript!
Table of Contents (18 chapters)
Title Page

Understanding parallel programming

Parallel programming, as the name suggests, is just a program running in such a way that instances of that program are running simultaneously multiple times.

Concurrent programming, on the other hand, is very similar to parallel programming, but with the difference that tasks never happen together.

Parallel versus concurrent programming

To understand the difference between parallel and concurrent programming, let us consider an example.

Suppose there's a competition to eat candies put on two plates. Plates are at a distance of five meters from each other. Let's say you're the only player for now, and the constraint is that you have to keep the number of differences in candies on both plates to less than two.

What will you do here? You have to eat from plate one, run five meters to plate two, eat from plate two, run five meters again to plate one, and so on.

Now, let's assume you have got a friend. Now, both of you can choose a plate and start eating your own...