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


In the previous chapter, we looked at interfaces. We saw how we can use interfaces to describe the behavior of a type. We also discovered that we can pass different types to functions that accept an interface, as long as the type satisfies the interface's method sets. We also saw how we can achieve polymorphism using interfaces.

In this chapter, we will look at how Go organizes its code into packages. We will see how we can hide or expose different Go constructs such as structs, interfaces, functions, and more, using packages. Our programs have been rather small in the number lines of code and in complexity to a certain extent. Most of our programs have been contained in a single code file, often named main.go, and inside a single package named main. Later in this chapter, we will explore the significance of package main, so do not be worried at this juncture if you do not understand it. This will not always be the case when you are working on a development team...