Book Image

Functional Programming in Go

By : Dylan Meeus
Book Image

Functional Programming in Go

By: Dylan Meeus

Overview of this book

While Go is a multi-paradigm language that gives you the option to choose whichever paradigm works best for the particular problem you aim to solve, it supports features that enable you to apply functional principles in your code. In this book, you’ll learn about concepts central to the functional programming paradigm and how and when to apply functional programming techniques in Go. Starting with the basic concepts of functional programming, this Golang book will help you develop a deeper understanding of first-class functions. In the subsequent chapters, you’ll gain a more comprehensive view of the techniques and methods used in functional languages, such as function currying, partial application, and higher-order functions. You’ll then be able to apply functional design patterns for solving common programming challenges and explore how to apply concurrency mechanisms to functional programming. By the end of this book, you’ll be ready to improve your code bases by applying functional programming techniques in Go to write cleaner, safer, and bug-free code.
Table of Contents (17 chapters)
1
Part 1: Functional Programming Paradigm Essentials
7
Part 2: Using Functional Programming Techniques
11
Part 3: Design Patterns and Functional Programming Libraries

Example: server constructor

In this first example, we are going to leverage what we’ve learned so far to create flexible constructors for data types. We will also see how we can create constructors with default values of our choosing.

In our setup, a Server struct is a simple struct that has a set number of maximum connections, a transport type, and a name. We won’t be building an actual web server, but rather, we are demonstrating the concepts with only a small amount of overhead. What we want to do in this example is to focus on the core ideas, which you can then apply anywhere you see fit. Our server only has three configurable parameters, but you can imagine that this benefit is more pronounced when there are more parameters to configure.

As always, we are going to start by defining the custom types of our application. To keep it lightweight, I’m defining two of them – TransportType, which is an int type to be used as an enumeration, and a type...