Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
5 (2)
Book Image

The Go Workshop

5 (2)
By: Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó

Overview of this book

The Go Workshop will take the pain out of learning the Go programming language (also known as Golang). It is designed to teach you to be productive in building real-world software. Presented in an engaging, hands-on way, this book focuses on the features of Go that are used by professionals in their everyday work. Each concept is broken down, clearly explained, and followed up with activities to test your knowledge and build your practical skills. Your first steps will involve mastering Go syntax, working with variables and operators, and using core and complex types to hold data. Moving ahead, you will build your understanding of programming logic and implement Go algorithms to construct useful functions. As you progress, you'll discover how to handle errors, debug code to troubleshoot your applications, and implement polymorphism using interfaces. The later chapters will then teach you how to manage files, connect to a database, work with HTTP servers and REST APIs, and make use of concurrent programming. Throughout this Workshop, you'll work on a series of mini projects, including a shopping cart, a loan calculator, a working hours tracker, a web page counter, a code checker, and a user authentication system. By the end of this book, you'll have the knowledge and confidence to tackle your own ambitious projects with Go.
Table of Contents (21 chapters)
Free Chapter
1
1. Variables and Operators
2
2. Logic and Loops

Introduction

Functions are a core part of many languages and Go is no exception. A function is a section of code that has been declared to perform a task. Go functions can have zero or more inputs and outputs. One feature that sets Go apart from other programming languages is the multiple return values; most programming languages are limited to one return value.

In the following section, we will see some features of Go functions that differ from other languages, such as returning multiple types. We will also see that Go has support for first-class functions. This means that Go has the ability to assign a variable to a function, pass a function as an argument, and have a function as a return type for a function. We will show how functions can be used to break up complex parts into smaller parts.

Functions in Go are considered first-class citizens and higher-order functions. First-class citizens are the functions that are assigned to a variable. Higher-order functions are functions...