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

Waiting for your goroutines to finish

This section will present a way to prevent the main() function from ending while it is waiting for its goroutines to finish using the sync package. The logic of the syncGo.go program will be based on create.go, which was presented in the previous section.

The first part of syncGo.go is as follows:

package main 
import ( 

As you can see, there is no need to import and use the time package, as we will use the functionality of the sync package and wait for as long as necessary for all the goroutines to end.

In Chapter 10, Concurrency in Go – Advanced Topics, you will study two techniques for timing out goroutines when they are taking longer than desired.

The second code segment of syncGo.go is shown in the following Go code:

func main() { 
    n := flag.Int("n...