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


Go's most basic collection is an array. When you define an array, you must specify what type of data it may contain and how big the array is in the following form: [<size>]<type>. For example, [10]int is an array of size 10 that contains ints, while [5]string is an array of size 5 that contains strings.

The key to making this an array is specifying the size. If your definition didn't have the size, it would seem like it works, but it would not be an array – it'd be a slice. A slice is a different, more flexible, type of collection that we'll look at after arrays. You can set the element values to be any type, including pointers and arrays.

You can initialize arrays with data using the following form: [<size>]<type>{<value1>,<value2>,…<valueN>}. For example, [5]string{1} would initialize the array with the first value as 1, while [5]string{9,9,9,9,9} would fill the array with the value 9 for each...