The Clojure Workshop: Use functional programming to build data-centric applications with Clojure and ClojureScript

by Joseph Fahey, Thomas Haratyk, Scott McCaughie, Yehonathan Sharvit, Konrad Szydlo

Overview

Learn how to solve problems using Clojure or ClojureScript and become a confident functional programmer with the help of engaging activities and challenging projects

Key Features

• Master the tools and patterns of the Clojure and ClojureScript ecosystems
• Learn the fundamentals of functional programming and immutability
• Apply your skills practically by developing a range of scalable applications

Book Description

The Clojure Workshop is a step-by-step guide to Clojure and ClojureScript, designed to quickly get you up and running as a confident, knowledgeable developer.

Because of the functional nature of the language, Clojure programming is quite different to what many developers will have experienced. As hosted languages, Clojure and ClojureScript can also be daunting for newcomers because of complexities in the tooling and the challenge of interacting with the host platforms. To help you overcome these barriers, this book adopts a practical approach. Every chapter is centered around building something.

As you progress through the book, you will progressively develop the 'muscle memory' that will make you a productive Clojure programmer, and help you see the world through the concepts of functional programming. You will also gain familiarity with common idioms and patterns, as well as exposure to some of the most widely used libraries.

Unlike many Clojure books, this Workshop will include significant coverage of both Clojure and ClojureScript. This makes it useful no matter your goal or preferred platform, and provides a fresh perspective on the hosted nature of the language.

By the end of this book, you'll have the knowledge, skills and confidence to creatively tackle your own ambitious projects with Clojure and ClojureScript.

What you will learn

• Write idiomatic code with Clojure and ClojureScript
• Understand and use common patterns and best practices
• Experiment with code and interact with programs using the REPL
• Learn the fundamentals of functional programming and immutability
• Master concepts including mapping, filtering, reducing and recursion
• Structure and build your code using namespaces and Leiningen
• Write unit tests to validate application behavior
• Simplify your code and improve efficiency with macros

Who this book is for

The Clojure Workshop is for anyone who is curious about functional programming and wants to get started learning Clojure or ClojureScript. Prior experience of another programming language, such as Java or JavaScript, is recommended, and will help you grasp the concepts covered in this book more easily.

Product Details

ISBN-13:	9781838825119
Publisher:	Packt Publishing
Publication date:	01/29/2020
Sold by:	Barnes & Noble
Format:	eBook
Pages:	800
File size:	14 MB
Note:	This product may take a few minutes to download.

About the Author

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.


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.


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!


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.


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.

Table of Contents

Table of Contents

1. Hello REPL!
2. Data Types and Immutability
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 Interop - (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