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Learn functional programming concepts using JavaScript ES6. You will learn concepts such as currying, partial functions, higher-order functions, and monads. Programming languages have evolved from focusing on procedures to objects and now on function. JavaScript supports functional programming and allows developers to write well-crafted code. What You Will Learn: Master functional programming concepts Identify how functions are treated in JavaScript Understand real-world functional libraries and create a functional library that mimics underscore.js Perform pure-error handling techniques such as functors and monads Discover ES6 functional features such as spread operators and generators Who This Book Is For: JavaScript developers (or beginners) who want to understand functional programming concepts and the functional nature of the language.
Das Buch ist eine Einführung in JavaScript, die sich auf gute Programmiertechniken konzentriert. Der Autor lehrt den Leser, wie man die Eleganz und Präzision von JavaScript nutzt, um browserbasierte Anwendungen zu schreiben. Das Buch beginnt mit den Grundlagen der Programmierung - Variablen, Kontrollstrukturen, Funktionen und Datenstrukturen -, dann geht es auf komplexere Themen ein, wie die funktionale und objektorientierte Programmierung, reguläre Ausdrücke und Browser-Events. Unterstützt von verständlichen Beispielen wird der Leser rasch die Sprache des Web fließend 'sprechen' können.
Unlock the powers of functional programming hidden within JavaScript to build smarter, cleaner, and more reliable web apps About This Book Write powerful code with the high-level functions that JavaScript offers Discover what functional programming is, why it's effective, and how it's used in JavaScript Understand and optimize JavaScript's hidden potential as a true functional language Who This Book Is For If you are a JavaScript developer interested in learning functional programming, looking for the quantum leap toward mastering the JavaScript language, or just want to become a better programmer in general, then this book is ideal for you. This guide is aimed at programmers, involved in developing reactive frontend apps, server-side apps that wrangle with reliability and concurrency, and everything in between. What You Will Learn Get a run through of the basic JavaScript language constructs Code using the powerful object-oriented feature in JavaScript Master DOM manipulation, cross-browser strategies, and ES6 Understand the basic concurrency constructs in Javascript and best performance strategies Harness the power of patterns for tasks ranging from application building to code testing Build large-scale apps seamlessly with the help of reactive patterns Explore advanced design patterns, including dependency injection Develop more powerful applications with currying and function composition Create more reliable code with closures and immutable data In Detail JavaScript is a high-level, dynamic, untyped, lightweight, and interpreted programming language and functional programming is a style that emphasizes and enables smarter code that minimizes complexity and increases modularity. It's a way of writing cleaner code through clever ways of mutating, combining, and using functions. And JavaScript provides an excellent medium for this approach. By learning how to expose JavaScript's true identity as a functional language, we can implement web apps that are more powerful, easier to maintain and more reliable. The java script: Functional Programming for JavaScript Developers course will take you on a journey to show how functional programming when combined with other techniques makes JavaScript programming more efficient. The first module Mastering JavaScript, stress on practical aspects of Javascript development like—Functions and Closures, Runtime debugging techniques, project layout, events and DOM processing, build tools, Object-oriented patterns, isomorphism—everything that a modern Javascript project would need. The second module, Mastering JavaScript Design Patterns - Second Edition, will explore how design patterns can help you improve and organize your JavaScript code. You'll get to grips with creational, structural, and behavioral patterns as you discover how to put them to work in different scenarios. This updated edition will also delve into reactive design patterns and microservices as they are a growing phenomenon in the world of web development. It will also show you some advanced patterns, including dependency injection and live post processing. The third module, Functional Programming in JavaScript, will help you to write real-world applications by utilizing a wide range of functional techniques and styles. It explores the core concepts of functional programming common to all functional languages, with examples of their use in JavaScript. Style and approach This course will begin with providing insights and practical tips on advanced JavaScript features to build highly scalable web and mobile system and move on to some design patterns with JavaScript. Finally, the course ends with presenting the functional programming techniques and styles in JavaScript.
JavaScript ist eine mächtige, objektorientierte Skriptsprache, deren Code in HTML-Seiten eingebettet und vom Browser interpretiert und ausgeführt wird. Richtig eingesetzt, eignet sie sich aber auch für die Programmierung komplexer Anwendungen und hat im Zusammenhang mit HTML5 noch einmal an Bedeutung gewonnen. Diese Kurzreferenz ist ein Auszug aus der überarbeiteten und ergänzten Neuauflage von JavaScript – Das umfassende Referenzwerk, 6. Auflage, der JavaScript-Bibel schlechthin. JavaScript kurz & gut befasst sich in den ersten neun Kapiteln mit der neuesten Version des Sprachkerns (ECMAScript 5) und behandelt die Syntax der Sprache, Typen, Werte, Variablen, Operatoren und Anweisungen sowie Objekte, Arrays, Funktionen und Klassen. All dies ist nicht nur für die Verwendung von JavaScript in Webbrowsern, sondern auch beim Einsatz von Node auf der Serverseite relevant. In den folgenden fünf Kapiteln geht es um die Host-Umgebung des Webbrowsers. Es wird erklärt, wie Sie clientseitiges JavaScript für die Erstellung dynamischer Webseiten und -applikationen verwenden und mit JavaScript auf die HTML5-APIs zugreifen. Diese Kapitel liefern Informationen zu den wichtigsten Elementen von clientseitigem JavaScript: Fenster, Dokumente, Elemente, Stile, Events, Netzwerke und Speicherung.
Wie entwickelt man eine gute JavaScript-Anwendung? Dieses Buch hilft Ihnen mit unzähligen Programmier-Mustern und Best Practices dabei, die Frage zu beantworten. Wenn Sie ein erfahrener Entwickler sind, der Probleme im Umfeld von Objekten, Funktionen und Vererbung lösen will, dann sind die Abstraktionen und Code-Vorlagen in diesem Buch ideal – egal, ob Sie eine Client-, Server- oder Desktop-Anwendung mit JavaScript erstellen. Dieses Buch wurde vom JavaScript-Experten Stoyan Stefanov geschrieben – Senior Yahoo! Technical und Architekt von YSlow 2.0, einem Tool zum Optimieren der Webseiten-Performance. Sie finden in JavaScript Patterns praktische Ratschläge für das Implementieren jedes beschriebenen Musters und ergänzend dazu viele nützliche Beispiele. Zudem lernen Sie Anti-Pattern kennen: häufig genutzte Programmier-Ansätze, die mehr Probleme verursachen, als sie lösen.
Explore the Underscore.js library by example using a test-driven development approach About This Book Understand and learn to apply functional programming principles using the built-in functions of Underscore.js Leverage and reuse Underscore.js-based code to create code that targets client, server, or database contexts Take Underscore.js further by reusing code between client and server and by learning about other closely related libraries Who This Book Is For If you are a developer with fundamental JavaScript knowledge and want to use modern JavaScript libraries to extend your functional programming skills, then Underscore.js is an important library you should be familiar with. What You Will Learn Reference and call Underscore.js functions using a modern JavaScript development workflow Apply Underscore.js to JavaScript arrays, objects, and functions Take advantage of object-oriented or functional programming techniques with Underscore.js Leverage Underscore.js to create code that targets client, server, or database contexts Extend Underscore.js functionality with other closely related libraries Reuse Underscore.js-based code between client and server applications Prepare for the upcoming JavaScript standard ECMAScript 6 and support older browsers In Detail Underscore.js is one of the most popular modern JavaScript libraries used for functional programming. It can be used as a base for building complex JavaScript applications in a sustainable manner and for building other JavaScript libraries. It embraces functional programming principles but is not opinionated and can be used with imperative, object-oriented, functional, or other programming styles. This book explores how to use Underscore.js to power your code and understand modern JavaScript development concepts while applying a lightweight and efficient workflow to build applications. The book starts with an incremental Underscore.js introduction by exploring key JavaScript concepts. You will then explore the basic features of Underscore.js in action and establish a lightweight development workflow that allows the provided examples to be guided by tests. The book then covers the functionality of Underscore.js with in-depth examples and explanations for understanding and applying the Underscore.js API. You'll also learn how to use Underscore.js as a base for your own modules and libraries within an object-oriented or functional programming style, and will be able to explore Underscore.js use cases in different environments. Eventually, you'll learn about libraries that are closely related with Underscore.js, how to share code between client and server, and how to prepare for the upcoming JavaScript standard ECMAScript 6. Style and approach This book takes an example-driven approach to describing some of the essential JavaScript concepts and practices that are useful for building sustainable applications.

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