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

Go arrays

Arrays are one of the most popular data structures for two reasons. The first reason is that they are simple and easy to understand, while the second reason is that they are very versatile and can store many different kinds of data.

You can declare an array that stores four integers as follows:

anArray := [4]int{1, 2, 4, -4}

The size of the array is stated before its type, which is defined before its elements. You can find the length of an array with the help of the len() function: len(anArray).

The index of the first element of any dimension of an array is zero; the index of the second element of any array dimension is one and so on. This means that for an array with one dimension named a, the valid indexes are from 0 to len(a)-1.

Although you might be familiar with accessing the elements of an array in other programming languages and using a for loop and one or more...