Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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Important characteristics of Go

This big section discusses important and essential Go features including variables, controlling program flow, iterations, getting user input, and Go concurrency. We begin by discussing variables, variable declaration, and variable usage.

Defining and using variables

Imagine that you wanted to perform some basic mathematical calculations with Go. In that case, you need to define variables to keep your input and your results.

Go provides multiple ways to declare new variables in order to make the variable declaration process more natural and convenient. You can declare a new variable using the var keyword followed by the variable name, followed by the desired data type (we will cover data types in detail in Chapter 2, Basic Go Data Types). If you want, you can follow that declaration with = and an initial value for your variable. If there is an initial value given, you can omit the data type and the compiler will guess it for you.