Gain insights into reactive programming with RxJS. Learn about observables, operators, and concurrent programming to create real-world applications like a real-time earthquake visualizer and spaceship game.

_ Reactive Programming with RxJS by The Pragmatic Programmer_ .png

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In this course, you will learn about reactive programming techniques and use them to create real-world applications. Throughout this course, you will learn important concepts of RxJS programming such as observables, operators, concurrent programming, and how to build a complete web application.

Additionally, you will have the opportunity to build out applications for different real-world scenarios so that you can put what you learn into practice. You will use RxJS operators in scenarios such as the real-time earthquake visualizer and the reactive spaceship game.

By the end, you will have a new skill that you can utilize to build reactive programs as well as a few new projects to add to your portfolio.

Reactive Programming with RxJS

Which of the following is the equivalent of `update` in the Observer Pattern?

Which of the following is the equivalent of <code>update</code> in the Observer Pattern?

**(True or False)** The following line creates the Observable but does not make the request:
```
var test = get('/api/contents.json');
```

(True or False) The following line creates the Observable but does not make the request:
<pre><code>var test = get('/api/contents.json');
</code></pre>

Methods that transform or query sequences are called: 

Methods that transform or query sequences are called:

When the Observable is not done (inactive or running)

When is the `onCompleted` callback omitted?

When is the <code>onCompleted</code> callback omitted?

Where should we have all the data in RxJS?

Where should we have all the data in RxJS?

Which operator takes an array as a parameter and returns an Observable?

Which operator takes an array as a parameter and returns an Observable?

**(True or False)** Transforming an event into an Observable unleashes the event from its natural constraints.


(True or False) Transforming an event into an Observable unleashes the event from its natural constraints.

Independent and can be used for different tasks

Dependent and can be used for only one task

Independent and cannot be used for different tasks

The new Observables created from the original Observables in JavaScript events are ________.

The new Observables created from the original Observables in JavaScript events are ________.

**(True or False)** Observables are immutable, and every operator applied to them creates a new Observable.

(True or False) Observables are immutable, and every operator applied to them creates a new Observable.

Getting Started

Introduction to Reactive Programming with RxJS

Understanding the Reactiveness

Understanding the Observables

Understanding Sequencing and its Operators

Make a Real-time Earthquake Visualizer

Building Concurrent Programs Through Pipelines

RxJS Subject Class

Building a Reactive Spaceship to Keep the Application Pure

Building a Complete Web Application Using RxJS

Getting Real Time Updates from Twitter using Node.js

Schedulers

React Web Applications With Cycle.js and using Model View Intent

Closing Remarks

Quiz Yourself on Observables