Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
5 (1)
Book Image

The Go Workshop

5 (1)
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

Methods for Bug-Free Code

We will briefly look at some methods that will help us to minimize the number of bugs that could be introduced into our code. These methods will also aid in giving us confidence as to the portions of the code that introduced the bug:

Figure 9.1: Different methods to debug code

Code Incrementally and Test Often

Let's consider the approach of developing incrementally. This means developing the program incrementally and testing it often after adding an incremental piece of code. This pattern will help you to track the bug easily because you are testing every small snippet of code as opposed to one large program.

Writing Unit Tests

When a test is written and code changes occur, the unit test protects the code from potential bugs being introduced. A typical unit test takes a given input and validates that a given result is produced. If the unit test is passing before the code change, but is now failing after the code change...