Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
14
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15
Index

Summary

This chapter presented two primary topics: functions and packages. Functions are first-class citizens in Go, which makes them powerful and handy. Remember that everything that begins with an uppercase letter is public. The only exception to this rule is package names. Private variables, functions, data type names, and structure fields can be strictly used and called internally in a package, whereas public ones are available to everyone. Additionally, we learned more about the defer keyword. Also, memorize that Go packages are not like Java classes—a Go package can be as big as it needs to be. Regarding Go modules, keep in mind that a Go module is multiple packages with a version.

Finally, this chapter discussed creating documentation, GitHub Actions and GitLab Runners, how the two CI/CD systems can help you automate boring processes and how to assign unique version numbers to your utilities.

The next chapter discusses system programming in general, as well as...