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

Duration Calculation

The ability to calculate the duration of an execution comes in handy during many aspects of programming. In our everyday life, we can monitor discrepancies and performance bottlenecks that our infrastructure might face. For example, if you have a script that takes only 5 seconds to complete on average and the monitoring execution time shows you a huge bump during certain hours of a day or certain days, it might be wise to investigate. The other aspect is related to web applications. Measuring the duration of request-response in your scripts can give you an insight into how well invested you are in your apps to serve high loads, and it even allows you to expand your capacity on certain days or weeks of the year. For example, if you have an online shop dealing with products, it might be wise to size your capacity according to patterns such as Black Friday or Christmas.

You may do well with a lower capacity during most of the year, but those holidays can result...