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 Go Race Detector

The Go race detector was added to Go to be able to detect race conditions. As we mentioned in Chapter 16, Concurrent Work, you can use goroutines to run parts of your code concurrently. However, even experienced programmers might make a mistake that allows different goroutines to access the same resource at the same time. This is called a race condition. A race condition is problematic because one goroutine can edit the resource in the middle of another reading it, meaning the resource could be corrupted. While Go has made concurrency a first-class citizen in the language, the mechanisms for concurrent code do not prevent race conditions. Also, due to the inherent nature of concurrency, a race condition might stay hidden until long after your code has been deployed. This also means they tend to be transient, making them devilishly difficult to debug and fix. This is why the Go race detector was created.

This tool works by using an algorithm that detects asynchronous...