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Clojure Reactive Programming

You're reading from   Clojure Reactive Programming Design and implement highly reusable reactive applications by integrating different frameworks with Clojure

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Product type Paperback
Published in Mar 2015
Publisher Packt
ISBN-13 9781783986668
Length 232 pages
Edition 1st Edition
Languages
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Author (1):
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Leonardo Borges Leonardo Borges
Author Profile Icon Leonardo Borges
Leonardo Borges
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Table of Contents (13) Chapters Close

Preface 1. What is Reactive Programming? FREE CHAPTER 2. A Look at Reactive Extensions 3. Asynchronous Programming and Networking 4. Introduction to core.async 5. Creating Your Own CES Framework with core.async 6. Building a Simple ClojureScript Game with Reagi 7. The UI as a Function 8. Futures 9. A Reactive API to Amazon Web Services A. The Algebra of Library Design B. Bibliography
Index

Identifying problems with our current approach

Aside from the lines of code responsible for building the user interface, our program is roughly 48 lines long.

The core of the program resides in the share-price and avg functions, which are responsible for querying the price service and calculating the average of a list of n numbers, respectively. They represent only six lines of code. There is a lot of incidental complexity in this small program.

Incidental complexity is complexity caused by code that is not essential to the problem at hand. In this example, we have two sources of such complexity—we are disregarding UI specific code for this discussion: the thread pool and the rolling buffer function. They add a great deal of cognitive load to someone reading and maintaining the code.

The thread pool is external to our problem. It is only concerned with the semantics of how to run tasks asynchronously. The rolling buffer function specifies a detailed implementation of a queue and how...

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