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
1. Variables and Operators
2
2. Logic and Loops

Panic

Several languages use exceptions for handling errors. However, Go does not use exceptions, it uses something called panic. Panic is a built-in function that causes the program to crash. It stops the normal execution of the Goroutine.

In Go, panic is not the norm, unlike other languages where an exception is a norm. A panic signal indicates something abnormal that is occurring within your code. Usually, when panic is initiated by runtime or the developer, it is to protect the integrity of the program.

Errors and panics differ in their purposes and how they are handled by the Go runtime. An error in Go indicates that something unexpected occurred, but it will not adversely impact the integrity of the program. Go expects that the developer will handle the error properly. The function or other programs will not typically crash if you do not handle the error. However, panics differ in this regard. When panic occurs, it will ultimately crash the system unless there are handlers...