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

Solving Sudoku puzzles

The main purpose of this section is to help you to understand that you should always use the simplest data structure that does the job you want it to. In this case, that data structure will be a humble slice, which will be used for representing and verifying a Sudoku puzzle. Alternatively, we could have used an array because Sudoku puzzles have a predefined size.

A Sudoku is a logic-based, combinatorial, number-placement puzzle. Verifying a Sudoku puzzle means making sure that the Sudoku puzzle is correctly solved – this is a task that can be easily done by a computer program.

In order to be as generic as possible, the presented utility, which is named sudoku.go and will be presented in four parts, will load Sudoku puzzles from external files.

The first part of sudoku.go is as follows:

package main 
import (