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Asynchronous JavaScript is everywhere, whether you’re using Ajax, AngularJS, Node.js, or WebRTC. This practical guide shows intermediate to advanced JavaScript developers how Promises can help you manage asynchronous code effectively—including the inevitable flood of callbacks as your codebase grows. You’ll learn the inner workings of Promises and ways to avoid difficulties and missteps when using them. The ability to asynchronously fetch data and load scripts in the browser broadens the capabilities of JavaScript applications. But if you don’t understand how the async part works, you’ll wind up with unpredictable code that’s difficult to maintain. This book is ideal whether you’re new to Promises or want to expand your knowledge of this technology. Understand how async JavaScript works by delving into callbacks, the event loop, and threading Learn how Promises organize callbacks into discrete steps that are easier to read and maintain Examine scenarios you’ll encounter and techniques you can use when writing real-world applications Use features in the Bluebird library and jQuery to work with Promises Learn how the Promise API handles asynchronous errors Explore ECMAScript 6 language features that simplify Promise-related code

With more than 300,000 copies sold, this acclaimed book of meditations is the perfect companion for anyone looking to add a moment of peace and self-reflection to their days. Some of us are recovering from addiction, trauma, codependency, or a mental health disorder. Others of us are simply looking to slow down our hectic lives and focus on personal growth and self-care. No matter what our reason for seeking wisdom and inspiration, a daily meditation practice can be an invaluable tool for our journey. This collection of engaging, healing, and practical meditations by trusted recovery authors Karen Casey and Martha Vanceburg reminds us that each day is an opportunity to be fully present and live our best lives. Complete with inspiring quotations from diverse voices and daily lessons on replacing shame and fear with hope and self-love, The Promise of a New Day is the perfect meaningful gift for a loved one or ourselves.

This book makes JavaScript less challenging to learn for newcomers, by offering a modern view that is as consistent as possible. Highlights: Get started quickly, by initially focusing on modern features. Test-driven exercises and quizzes available for most chapters (sold separately). Covers all essential features of JavaScript, up to and including ES2019. Optional advanced sections let you dig deeper. No prior knowledge of JavaScript is required, but you should know how to program.

All of JavaScript's newest features, in depth, made easy to understand. JavaScript is a rapidly changing language and it can be challenging to keep up with all the new toys being added. JavaScript: The New Toys explores the newest features of the world's most popular programming language while also showing readers how to track what's coming next. After setting the stage by covering who manages the process of improving JavaScript, how new features get introduced, terminology, and a high-level overview of new features, it details each new or updated item in depth, with example uses, possible pitfalls, and expert recommendations for updating old habits in light of new features. JavaScript: The New Toys: Covers all the additions to JavaScript in ES2015-ES2020 plus a preview of what's coming next Explores the latest syntax: nullish coalescing, optional chaining, let and const, class syntax, private methods, private fields, new.target, numeric separators, BigInt, destructuring, default parameters, arrow functions, async functions, await, generator functions, ... (rest and spread), template literals, binary and octal literals, ** (exponentiation), computed property/method names, for-of, for-await-of, shorthand properties, and others Details the new features and patterns including modules, promises, iteration, generators, Symbol, Proxy, reflection, typed arrays, Atomics, shared memory, WeakMap, WeakSet, and more Highlights common pitfalls and explains how to avoid them Shows how to follow the improvements process and even participate in the process yourself Explains how to use new features even before they're widely supported With its comprehensive coverage and friendly, accessible style, JavaScript: The New Toys provides an invaluable resource for programmers everywhere, whether they work in web development, Node.js, Electron, Windows Universal Apps, or another JavaScript environment.

This the story of how a young man turned $25 into more than 200 schools around the world and the guiding steps anyone can take to lead a successful and significant life. The author began working summers at hedge funds when he was just sixteen years old, sprinting down the path to a successful Wall Street career. But while traveling he met a young boy begging on the streets of India, who after being asked what he wanted most in the world, simply answered, "A pencil." This small request led to a staggering series of events that took the author backpacking through dozens of countries before eventually leaving one of the world's most prestigious jobs at Bain & Company to found Pencils of Promise, the organization he started with just $25 that has since built more than 200 schools around the world. This book chronicles the author's journey to find his calling, as each chapter explains one clear step that every person can take to turn your biggest ambitions into reality, even if you start with as little as $25. His story takes readers behind the scenes with business moguls and village chiefs, world-famous celebrities and hometown heroes. It is filled with compelling stories and shareable insights. All proceeds from this book support Pencils of Promise.

This book focuses on the new asynchronous features in JavaScript, which are new and confusing to developers. The book covers promises, generators, and coroutines, all of which allow developers to created more sophisticated single-page web applications that provide the features of a desktop application without tying up the user's browser.