Download Functional Reactive Programming by Stephen Blackheath, Anthony Jones PDF

By Stephen Blackheath, Anthony Jones


Functional Reactive Programming teaches the ideas and functions of FRP. It bargains a cautious walk-through of center FRP operations and introduces the options and methods you have to to exploit FRP in any language.

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

About the Technology

Today's software program is moving to extra asynchronous, event-based ideas. for many years, the Observer trend has been the go-to occasion infrastructure, however it is understood to be bug-prone. useful reactive programming (FRP) replaces Observer, notably enhancing the standard of event-based code.

About the Book

Functional Reactive Programming teaches you ways FRP works and the way to exploit it. you will commence by means of gaining an realizing of what FRP is and why it is so strong. Then, you are going to paintings via greenfield and legacy code as you discover ways to observe FRP to useful use circumstances. you will find examples during this e-book from many software domain names utilizing either Java and JavaScript. when you are complete, possible use the FRP process within the structures you construct and spend much less time solving difficulties.

What's Inside

  • Think in a different way approximately info and events
  • FRP suggestions for Java and JavaScript
  • Eliminate Observer one listener at a time
  • Explore Sodium, RxJS, and Kefir.js FRP systems

About the Reader

Readers want intermediate Java or JavaScript talents. No adventure with sensible programming or FRP required.

About the Authors

Stephen Blackheath and Anthony Jones are skilled software program builders and the creators of the Sodium FRP library for a number of languages. Foreword by means of Heinrich Apfelmus. Illustrated by way of Duncan Hill.

Table of Contents

  1. Stop listening!
  2. Core FRP
  3. Some daily widget stuff
  4. Writing a true software
  5. New suggestions
  6. FRP on the internet
  7. Switch
  8. Operational primitives
  9. Continuous time
  10. Battle of the paradigms
  11. Programming within the genuine international
  12. Helpers and styles
  13. Refactoring
  14. Adding FRP to current tasks
  15. Future directions

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Additional info for Functional Reactive Programming

Sample text

A statement made in terms of frame of reference A can be nonsensical with respect to frame of reference B. Each person may even think the other is insane. Thomas Kuhn described this situation by saying that the two ways of thinking are incommensurable. By way of example, on Christmas, we like to eat ice cream at the beach and then jump into the sea. This may seem like strange behavior, but what else would you do on a hot summer day? 2 Paradigm shift A person can change their paradigm, either slowly or all at once through an epiphany.

The type of sClicked is Stream, so the type of the values propagated by the stream is Unit. ” Unit is a term and concept from functional programming. Here’s why it’s useful. In OOP programming, an event handler can take any number of arguments as needed. Because a button click has no information associated with it other than the fact that it happened, you’d normally define a handler that takes no arguments, like this: public void buttonClicked() { ... } FRP is a little different. You can think of it as internally using event handlers that always take one argument.

CompareTo(r) <= 0); SButton ok = new SButton("OK", valid); We’re using Java and the authors’ Sodium FRP library. We’ll branch out into other FRP systems and languages later in the book. What we use doesn’t matter much for the teaching of FRP. Apart from surface differences, FRP is much the same in any language or FRP system. FRP uses two fundamental data types: ■ ■ Cells represent values that change over time. Your programming language already has variables that allow you to represent changing values.

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