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 (15 chapters)

Reading text files

A text file is the most common kind of file that you can find on a UNIX system. In this section, you will learn how to read text files in three ways: line by line, word by word, and character by character. As you will see, reading a text file line by line is the easiest method to access a text file, while reading a text file word by word is the most difficult method of all.

If you look closely at the byLine.go, byWord.go, and byCharacter.go programs, you will see many similarities in their Go code. Firstly, all three utilities read the input file line by line. Secondly, all three utilities have the same main() function, with the exception of the function that is called in the for loop of the main() function. Lastly, the three functions that process the input text files are almost identical, except for the part that implements the actual functionality of the...