Book Image

The Go Workshop

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

The Go Workshop

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

In the previous chapter, we looked at how to marshal and unmarshal JSON. We were able to set our struct to the JSON key values and place our struct values into JSON. The Go programming language has great library support for JSON, just like it has good support for the filesystem-type operations (for example, the open, create, and modify files).

In this chapter, we will interact with the filesystem. The levels we are going to be working with the filesystem at are the file, directory, and permission levels. We will tackle everyday issues that developers face when working with the filesystem, including how to write a command-line application that needs to accept arguments from the command line. We will learn how to create a command-line application that will read and write files. Along with discussing what happens when we get a signal interrupt from the OS, we will demonstrate how to perform cleanup actions before our application stops running. We will also handle a scenario...