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


A channel is a communication mechanism that allows goroutines to exchange data, among other things.

However, there are some specific rules. Firstly, each channel allows the exchange of a particular data type, which is also called the element type of the channel, and secondly, for a channel to operate properly, you will need someone to receive what is sent via the channel. You should declare a new channel using the chan keyword, and you can close a channel using the close() function.

Finally, a very important detail: when you are using a channel as a function parameter, you can specify its direction; that is, whether it is going to be used for sending or receiving. In my opinion, if you know the purpose of a channel in advance, you should use this capability because it will make your programs more robust, as well as safer. You will not be able to send data accidentally...