Book Image

Learning Functional Programming in Go

By : Lex Sheehan
Book Image

Learning Functional Programming in Go

By: Lex Sheehan

Overview of this book

Lex Sheehan begins slowly, using easy-to-understand illustrations and working Go code to teach core functional programming (FP) principles such as referential transparency, laziness, recursion, currying, and chaining continuations. This book is a tutorial for programmers looking to learn FP and apply it to write better code. Lex guides readers from basic techniques to advanced topics in a logical, concise, and clear progression. The book is divided into four modules. The first module explains the functional style of programming: pure functional programming, manipulating collections, and using higher-order functions. In the second module, you will learn design patterns that you can use to build FP-style applications. In the next module, you will learn FP techniques that you can use to improve your API signatures, increase performance, and build better cloud-native applications. The last module covers Category Theory, Functors, Monoids, Monads, Type classes and Generics. By the end of the book, you will be adept at building applications the FP way.
Table of Contents (21 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Development workflow summary


How you manage your dependencies, build, run, and deploy your applications is a matter of preference. It's often a good idea to get all of the developers in your team to  build applications the same way. The techniques shared in this section demonstrate the way I built the demo applications for this book. I kept it simple. However, the rest of the story is that I rarely build applications in isolation like I did for this book. Nearly every time, I use Docker in my development/test/deployment workflow. Note that the use of Docker is out of scope of this book.

Troubleshooting dot init

This is how I resolved the build errors that occurred when converting Chapter 4, SOLID Design in Go, to the dot init technique.

First, I used the cd command to direct to the project's root directory (where the project is Chapter 4SOLID Design in Go, source code):

Next, I ran glide-update to tell Glide to put the dependencies in the vendors directory:

But, that failed because the import...