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


Although arrays, slices, and maps are all very useful, they cannot group and hold multiple values in the same place. When you need to group various types of variables and create a new handy type, you can use a structure. The various elements of a structure are called the fields of the structure or just fields.

I will start this section by explaining a simple structure that was first defined in the sortSlice.go source file of the previous chapter:

type aStructure struct { 
    person string 
    height int 
    weight int 

For reasons that will become evident in Chapter 6, What You Might Not Know About Go Packages and Go Functions, the fields of a structure usually begin with an uppercase letter – this mainly depends on what you want to do with the fields. This structure has three fields named person, height, and weight, respectively. You can create a new variable...