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

The select keyword

As you will learn in a short while, the select keyword is pretty powerful and can do many things in a variety of situations. The select statement in Go looks like a switch statement but for channels. In practice, this means that select allows a goroutine to wait on multiple communication operations. Therefore, the main benefit that you receive from select is that it gives you the power to work with multiple channels using a single select block. As a consequence, you can have nonblocking operations on channels, provided that you have appropriate select blocks.

The biggest problem when using multiple channels and the select keyword is deadlocks. This means that you should be extra careful during the design and the development process in order to avoid such deadlocks.

The Go code of select.go will clarify the use of the select keyword. This program will be presented...