Book Image

Reactive Programming for .NET Developers

Book Image

Reactive Programming for .NET Developers

Overview of this book

Reactive programming is an innovative programming paradigm focused on time-based problem solving. It makes your programs better-performing, easier to scale, and more reliable. Want to create fast-running applications to handle complex logics and huge datasets for financial and big-data challenges? Then you have picked up the right book! Starting with the principles of reactive programming and unveiling the power of the pull-programming world, this book is your one-stop solution to get a deep practical understanding of reactive programming techniques. You will gradually learn all about reactive extensions, programming, testing, and debugging observable sequence, and integrating events from CLR data-at-rest or events. Finally, you will dive into advanced techniques such as manipulating time in data-flow, customizing operators and providers, and exploring functional reactive programming. By the end of the book, you'll know how to apply reactive programming to solve complex problems and build efficient programs with reactive user interfaces.
Table of Contents (15 chapters)
Reactive Programming for .NET Developers
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface

Advanced operators


Sometimes, we need functions to create message repetitions or to manipulate or reuse a subscription with multiple observers. This is the time when advanced operators come into play.

IgnoreElements

The IgnoreElements factory method creates a new sequence that will ignore any value message. Instead, errors and completion messages will normally flow out from the sourcing sequence.

This method is particularly useful to create multiple acknowledgements or simply to append some completion code to a sourcing sequence. Here's an example:

//the sourcing sequence of errors or completed messages 
var sourcingSequence = Observable.Throw<object>(new Exception("Test")); 
 
//a sequence able to handle only errors or completed messages 
var ignoredElements = sourcingSequence.IgnoreElements(); 
ignoredElements.Subscribe(new ConsoleObserver()); 

The ConsoleObserver class is the same as that of the previous examples. See the Interval or Create sections in...