Book Image

Mastering Go - Second Edition

By : Mihalis Tsoukalos
Book Image

Mastering Go - Second Edition

By: Mihalis Tsoukalos

Overview of this book

Often referred to (incorrectly) as Golang, Go is the high-performance systems language of the future. Mastering Go, Second Edition helps you become a productive expert Go programmer, building and improving on the groundbreaking first edition. Mastering Go, Second Edition shows how to put Go to work on real production systems. For programmers who already know the Go language basics, this book provides examples, patterns, and clear explanations to help you deeply understand Go’s capabilities and apply them in your programming work. The book covers the nuances of Go, with in-depth guides on types and structures, packages, concurrency, network programming, compiler design, optimization, and more. Each chapter ends with exercises and resources to fully embed your new knowledge. This second edition includes a completely new chapter on machine learning in Go, guiding you from the foundation statistics techniques through simple regression and clustering to classification, neural networks, and anomaly detection. Other chapters are expanded to cover using Go with Docker and Kubernetes, Git, WebAssembly, JSON, and more. If you take the Go programming language seriously, the second edition of this book is an essential guide on expert techniques.
Table of Contents (20 chapters)
Title Page

Creating example functions

Part of the documentation process is generating example code that showcases the use of some or all of the functions and types of a package. Example functions have many benefits, including the fact that they are executable tests that are executed by go test. Therefore, if an example function contains an // Output: line, the go test tool will check whether the calculated output matches the values found after the // Output: line.

Additionally, examples are really useful when seen in the documentation of the package, which is the subject of the next section. Finally, example functions that are presented on the Go documentation server ( allow the reader of the documentation to experiment with the example code. The Go playground at also supports this functionality.

As the go test subcommand is...