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


Parameters define what arguments can be passed to our function. Functions can have zero or more parameters. Even though Go allows us to define multiple parameters, we should take care not to have a huge parameter list; that would make the code harder to read. It also may be an indication that the function is doing more than one specific task. If that is the case, we should refactor the function. Take, for example, the following code snippet:

func calculateSalary(lastName string, firstName string, age int, state string, country string, hoursWorked int, hourlyRate, isEmployee bool) {
// code

The preceding code is an example of a function whose parameter list is bloated. The parameter list should pertain only to the single responsibility of the function. We should only define the parameters that are needed to solve the specific problem that the function is built for.

Parameters are the input types that our function will use to perform its task. Function parameters...