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
About the Authors
About the Reviewer

Discriminated Unions and the Record type

Discriminated Unions and Union types represent for the first time since the beginning of the chapter constructs not necessarily related to functional programming. They are essential to simplify the development of libraries and applications in F#.

The Record type is a set of simple values that are named and can optionally have members.

Their syntax is as follows:

[ attributes ] 
type [accessibility-modifier] typename = {  
    [ mutable ] label1 : type1; 
    [ mutable ] label2 : type2; 

Take a look at the following example:

//Record Type 
type Point = { x : float; y: float; z: float option; }  
let point2D = { x = 1.0; y = 1.0; z = None} 
let point3D = { point2D with z = Some(-1.0)} 


In this example, you can see some of the syntactic features of the Record type.

The keyword option declared during the type definition indicates that value can be inserted or...