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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

Closures and variable scoping

Closures are closely related to how variable scoping works in a given programming language. To fully understand how they work and how they become useful, we will first do a quick refresher on how variable scoping works in Go. Next, we’ll remind ourselves of how anonymous functions work and what they are. Finally, we will take a look at what closures are in this context. This will set us up to properly understand partial application and function currying when we get to those techniques later in the chapter.

Variable scoping in Go

Variable scoping in Go is done by what is called lexical scoping. This means that a variable is identified and usable within the context where it was created. In Go, “blocks” are used to delineate locations in code. For example, see the following:

package main
import "fmt"
// location 1
func main() {
     // location 2
     b := true
 ...
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Functional Programming in Go
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