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

Methods as Routines

So far, you've only seen functions used as Goroutines, but methods are simple functions with a receiver; hence, they can be used asynchronously too. This can be useful if you want to share some properties of your struct, such as for your counter in an HTTP server.

With this technique, you can encapsulate the channels you use across several routines belonging to the same instance of a struct without having to pass these channels everywhere.

Here is a simple example of how to do that:

type MyStruct struct {}
func (m MyStruct) doIt()
. . . . . . 
ms := MyStruct{}
go ms.doIt()

But let's see how to apply this in an exercise.

Exercise 16.10: A Structured Work

In this exercise, we will calculate a sum using several workers. A worker is essentially a function, and we will be organizing these workers into a single struct.

  1. Create your folder and main file. In it, add the required imports and define a Worker struct with two channels –...