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. Variables and Operators
2. Logic and Loops

The goimports Tool

Another useful tool that comes with Go is goimports, which automatically adds the imports that are needed in your file. A key part of software engineering is not reinventing the wheel and reusing other people's code. In Go, you do this by importing the libraries at the start of your file, in the import section. It can, however, be tedious to add these imports each time you need to use them. You can also accidentally leave in unused imports, which can pose a security risk. A better way to do this is to use goimports to automatically add the imports for you. It will also remove unused imports and reorder the remaining imports into alphabetical order for better readability.

Exercise 17.04: Using the goimports Tool

In this exercise, you will learn how to use goimports to manage the imports in a simple Go program. When you run the goimports tool, it will output how it thinks the file should look with the imports fixed. Alternatively, you can run goimports with...