The Clean Way to Use Rx
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The Clean Way to Use Rx

Guide manual and tips for implementing with Rx extensions.

About the Book

This work, groups the different practices used in the implementation of software components through Rx extensions. These practices are organized into 35 application items, and for each item, it is analyzed, which are the recommended code practices and the practices to avoid.

It could also be said that this document is the compilation of good practices learned through the own experience acquired in business projects, recommendations received from forums, blogs, workshops and in general from analyzes given by experts in the area, including the recommendations given in the official sites of each extension.

This book is also intended as a practical reference manual for implementing Rx code. That is why much of the book's material consists of examples of code snippets written in the main programming languages ​​for both Frontend (mobile, web; that is, JavaScript, Swift, Java) such as Backend.

The concepts studied in each of the items are agnostic to the programming language, there are few cases in which a certain capacity is not available in an extension and in which case the respective annotation is made in the item.

It is intended that once the concepts of each item have been studied, the reader benefits from a greater understanding of how Rx works.

Readers will also be equipped with tools to apply good practices that are ultimately reflected in the solutions in the area of:

- Clean Code.

- Best performance:

- Mitigate bugs scenarios.

About the Author

Yair Carreno
Yair Carreno

Yair is a Software Architect specialized in mobile solutions. For more than a decade he has been designing and developing products for different companies in different areas such as finance, entertainment, social.

He likes to teach and share his knowledge in one of his most passionate fields, software design, and development.

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Table of Contents

  • Prefacio
    • About the book
    • About the source code
    • Content development
    • Glossary
    • Audience
    • Questions and contact
    • Versions of IDEs and technologies used.
    • Changelog
  • Foundation
    • Item 1: From Imperative to Reactive
    • Item 2: Focus on pure functions
    • Item 3: Check the nature of the streams when they are linked
    • Item 4: Decide when to use an Observable type empty or never
  • Be Clean
    • Item 5: Keep clean the operators’ chain
    • Ítem 6: Define functional operator chains
    • Item 7: Do not nest subscriptions, use operator chain
    • Ítem 8: Use Rx when there are events involved
    • Item 9: Do not orchestrate Rx operations with imperative programming
    • Item 10: Do not include Rx code in Do operators
    • Item 11: Propagate wrappers, not units
    • Item 12: Avoid propagating null values, turn to Optionals
    • Item 13: Remember you can use a filter, instead of if sentence
    • Item 14: It is possible to divide the emission when if-else is presented
    • Item 15: Sharing code is not the same as sharing emissions
    • Item 16: Not everything is delegated to the Observer
    • Item 17: Delay as much as possible the definition of the Schedule
  • Flow dependencies
    • Item 18: Check completion or error events when using filters
    • Item 19: Beware of reduction operators on infinite streams
    • Item 20: Maintain consistency like the stream
    • Item 21: Be careful when you depend on onComplete
    • Item 22: An additional step in the operator chain
    • Item 23: Orchestrating and combining effectively
  • Operators
    • Item 24: Properly select operators
    • Item 25: Use the map operator only for transformations
  • Timing
    • Item 26: Make sure you execute the tasks at the right time
    • Item 27: Control execution times on dependent tasks
  • Error handling
    • Item 28: Handling errors
  • Multicasting
    • Item 29: Share Observables, share Observers, or both
  • Multi-threading
    • Item 30: Rx is single-threaded by default
    • Item 31: Do the order of the subscribeOn and observeOn operators matter?
    • Item 32: Some operators bring a predefined Scheduler
    • Item 33: Negotiating with UI
  • Optimizing
    • Item 34: Properly canceling the subscription
    • Item 35: When to use Subjects or Traits?
  • RxJS code snippet
  • RxJava code snippet
  • Rules summary
  • Changelog
    • Revision 1 (07-17-2020)
    • Revision 2 (07-20-2020)
  • Notes

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