Download e-book for iPad: Functional Programming in JavaScript: How to improve your by Luis Atencio

By Luis Atencio

Summary

Functional Programming in JavaScript teaches JavaScript builders useful options that might increase extensibility, modularity, reusability, testability, and function. via concrete examples and jargon-free causes, this booklet teaches you ways to use useful programming to real-life improvement tasks

Purchase of the print e-book contains a unfastened e-book in PDF, Kindle, and ePub codecs from Manning Publications.

About the Technology

In complicated internet functions, the low-level info of your JavaScript code can imprecise the workings of the process as an entire. As a coding variety, sensible programming (FP) promotes loosely coupled relationships one of the elements of your program, making the massive photo more straightforward to layout, converse, and maintain.

About the Book

Functional Programming in JavaScript teaches you ideas to enhance your net purposes - their extensibility, modularity, reusability, and testability, in addition to their functionality. This easy-to-read booklet makes use of concrete examples and transparent factors to teach you ways to take advantage of practical programming in actual existence. in case you are new to practical programming, you will relish this guide's many insightful comparisons to vital or object-oriented programming that assist you comprehend useful layout. by means of the top, you will take into consideration software layout in a clean new method, and you'll even develop to understand monads!

What's Inside

  • High-value FP ideas for real-world uses
  • Using FP the place it makes the main sense
  • Separating the common sense of your process from implementation details
  • FP-style blunders dealing with, checking out, and debugging
  • All code samples use JavaScript ES6 (ES 2015)

About the Reader

Written for builders with an effective seize of JavaScript basics and net program design.

About the Author

Luis Atencio is a software program engineer and architect development firm purposes in Java, Hypertext Preprocessor, and JavaScript.

Table of Contents

    PART 1 imagine FUNCTIONALLY

  1. Becoming sensible
  2. Higher-order JavaScript
  3. PART 2 GET FUNCTIONAL

  4. Few info buildings, many operations
  5. Toward modular, reusable code
  6. Design styles opposed to complexity
  7. PART three bettering YOUR practical SKILLS

  8. Bulletproofing your code
  9. Functional optimizations
  10. Managing asynchronous occasions and data

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Extra resources for Functional Programming in JavaScript: How to improve your JavaScript programs using functional techniques

Example text

This is due to FP’s inherent declarative mode of development. 1 Declarative programming Pure functions Referential transparency Immutability Functional programming is declarative Functional programming falls under the umbrella of declarative programming paradigms: it’s a paradigm that expresses a set of operations without revealing how they’re implemented or how data flows through them. The more popular models used today, though, are imperative or procedural, and are supported in most structured and objectoriented languages like Java, C#, C++, and others.

Stateless code has zero chance of changing or breaking global state. To achieve this, you’ll use functions that avoid side effects and changes of state, known as pure functions. 2 Pure functions and the problem with side effects Functional programming is based on the premise that you build immutable programs based on the building blocks of pure functions. A pure function has the following qualities: ■ ■ It depends only on the input provided and not on any hidden or external state that may change during its evaluation or between calls.

Object-oriented applications, which are mostly imperative, rely heavily on objectbased encapsulation to protect the integrity of their mutable state, both direct and inherited, in order to expose or manipulate that state via instance methods. As a result, there’s a tight coupling between an object’s data and its fine-grained behavior, forming a cohesive package; this is the goal in object-oriented programs and why the central form of abstraction is the object. Alternatively, functional programming removes the need to hide data from the callers and typically works with a smaller set of very simple data types.

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