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The Clojure Workshop

You're reading from The Clojure Workshop Use functional programming to build data-centric applications with Clojure and ClojureScript

Product type Paperback

Published in Jan 2020

Publisher Packt

ISBN-13 9781838825485

Length 800 pages

Edition 1st Edition

Languages

Clojure

Tools

ClojureScript

Concepts

Functional Programming

Authors (5):

Konrad Szydlo

Yehonathan Sharvit

Scott McCaughie

Thomas Haratyk

Joseph Fahey

+1 more

View More author details

Table of Contents (17) Chapters

Preface

About the Book

1. Hello REPL!

2. Data Types and Immutability FREE CHAPTER

3. Functions in Depth

4. Mapping and Filtering

5. Many to One: Reducing

6. Recursion and Looping

7. Recursion II: Lazy Sequences

8. Namespaces, Libraries and Leiningen

9. Host Platform Interoperability with Java and JavaScript

10. Testing

11. Macros

12. Concurrency

13. Database Interaction and the Application Layer

14. HTTP with Ring

15. The Frontend: A ClojureScript UI

Appendix

Why Testing Is Important

At the beginning of this chapter, we saw that software testing is important. Why? In order to answer that, we will need to understand what software testing is. It can be defined as a process that ensures that a particular piece of software is bug-free. A software bug is a problem that causes a program to crash or produce invalid output. In Chapter 9, Host Platform Interoperability with Java and JavaScript, we learned about errors in Clojure and ClojureScript. Testing is a step-by-step process that ensures that software passes expected standards of performance, set by customers or the industry. These steps can also help to identify errors, gaps, or missing requirements. Bugs, errors, and defects are synonyms. They all mean problems with our software.

The benefits of software testing are as follows:

Providing a high-quality product with low maintenance costs
Assuring the accuracy and consistency of the product
Discovering errors that are not...

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Authors (5)

Joseph Fahey

Joseph Fahey

Joseph Fahey has been a developer for nearly two decades. He got his start in the Digital Humanities in the early 2000s. Ever since then, he has been trying to hone his skills and expand his inventory of techniques. This lead him to Common Lisp and then to Clojure when it was first introduced. As an independent developer, Joseph was able to quickly start using Clojure professionally. These days, Joseph gets to write Clojure for his day job at Empear AB.

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Konrad Szydlo

Konrad Szydlo

Konrad Szydlo is a psychology and computing graduate from Bournemouth University. He has worked with Clojure for the last 8 years. Since January 2016, he has worked as a software engineer and team leader at Retailic, responsible for building a website for the biggest royalty program in Poland. Prior to this, he worked as a developer with Sky, developing e-commerce and sports applications, where he used Ruby, Java, and PHP. He is also listed in the Top 75 Datomic developers on GitHub.

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Yehonathan Sharvit

Yehonathan Sharvit

Yehonathan Sharvit has been a software developer since 2001. He discovered functional programming in 2009. It has profoundly changed his view of programming and his coding style. He loves to share his discoveries and his expertise. He has been giving courses on Clojure and JavaScript since 2016. He holds a master's degree in Mathematics.

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Scott McCaughie

Scott McCaughie

Scott McCaughie lives near Glasgow, Scotland where he works as a senior Clojure developer for Previse, a Fintech startup aiming to solve the problem of slow payments in the B2B space. Having graduated from Heriot-Watt University, his first 6 years were spent building out Risk and PnL systems for JP Morgan. A fortuitous offer of a role learning and writing Clojure came up and he jumped at the chance. 5 years of coding later and it's the best career decision he's made. In his spare time, Scott is an avid reader, enjoys behavioral psychology and financial independence podcasts, and keeps fit by commuting by bike, running, climbing, hill walking, snowboarding. You get the picture!

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Thomas Haratyk

Thomas Haratyk

Thomas Haratyk graduated from Lille University of Science and Technology and has been a professional programmer for nine years. After studying computer science and starting his career in France, he is now working as a consultant in London, helping start-ups develop their products and scale their platforms with Clojure, Ruby, and modern JavaScript.

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