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JavaScript: Functional Programming for JavaScript Developers

Written by Ved Antani,Simon Timms,Dan Mantyla

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635 pages, about 13 hours of reading

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About this book

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.

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Reading guide

Themes, characters and key ideas in JavaScript: Functional Programming for JavaScript Developers, written by Chaptra AI.

  • about 30 hours
  • intermediate/advanced
  • instructive
  • challenging
  • insightful

This book serves as a comprehensive guide for JavaScript developers seeking to integrate functional programming paradigms into their workflow. It systematically introduces core functional concepts like pure functions, immutability, higher-order functions, and composition, demonstrating their practical application within JavaScript. The authors aim to equip readers with the knowledge to write more maintainable, testable, and robust code by leveraging FP principles. It progresses from fundamental concepts to more advanced techniques, making a strong case for the benefits of functional programming in modern JavaScript development.

Pure functions are the bedrock of functional programming; they are predictable and easy to test.

Key themes

Predictability and Testability
The book extensively highlights how functional programming, through pure functions and immutability, leads to code that behaves predictably and is inherently easier to test. Side effects are minimized, making unit testing straightforward.
Managing Complexity and Side Effects
The book consistently addresses how FP provides strategies to manage and contain complexity, particularly by minimizing or isolating side effects. This leads to more predictable and easier-to-reason-about codebases.
Modularity and Reusability
FP encourages breaking down problems into smaller, independent, and reusable functions. Concepts like higher-order functions, currying, and composition are presented as tools for building highly modular systems.

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What are the primary benefits of adopting functional programming principles in a large-scale JavaScript application?

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