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

Creating concurrent functions

Broadly speaking, there are two types of concurrency that we will be looking at in this chapter. We can call them intra-concurrency and extra-concurrency:

  • Intra-concurrency is about creating functions that are implemented concurrently internal to each function. For example, in Chapter 6, we saw various functions such as Filter, Map, and FMap that lend themselves to a concurrent implementation. That will be the focus of this section. Notably, they can be used in conjunction with each other so that we achieve concurrency at multiple steps in our algorithm, and we can even decide on the level of concurrency required for each step individually.
  • Extra-concurrency is about chaining together functions using Go's built-in concurrency features: channels and goroutines. This is explored later in the chapter.

Why are many of the fundamental building blocks of functional programming good candidates for concurrency? Well, first and foremost...