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  • Book Overview & Buying Functional Programming in Go
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Functional Programming in Go

Functional Programming in Go

By : Dylan Meeus
4.9 (12)
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Functional Programming in Go

Functional Programming in Go

4.9 (12)
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)
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1
Part 1: Functional Programming Paradigm Essentials
7
Part 2: Using Functional Programming Techniques
11
Part 3: Design Patterns and Functional Programming Libraries

What is purity?

When talking about a purely functional programming language, we are talking about a language in which each function adheres to these properties:

  • Does not generate any side effects
  • Returns the same output when providing the same input (idempotence)

This means that our functions are completely deterministic.

The best way forward might be to demonstrate what we are talking about by showing some examples. So, in this section, we’ll take a look at two functions, a pure one and another which is impure. Then, we’ll talk a bit more about the properties of such functions and their importance to the programs that we are writing.

Demonstrating pure versus impure function calls

A simple example of this would be an addition function. This is a function that takes two integers as input and returns the sum as the output:

func add(a, b int) int {
	return a + b
}

When we call this function with the same inputs, we will get consistent output...

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Functional Programming in Go
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