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)
14
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Index

Structures

Structures in Go are both very powerful and very popular and are used for organizing and grouping various types of data under the same name. Structures are the more versatile data types in Go and they can even be associated with functions, which are called methods.

Structures, as well as other user-defined data types, are usually defined outside the main() function or any other package function so that they have a global scope and are available to the entire Go package. Therefore, unless you want to make clear that a type is only useful within the current local scope and is not expected to be used elsewhere, you should write the definitions of new data types outside functions.

Defining new structures

When you define a new structure, you group a set of values into a single data type, which allows you to pass and receive this set of values as a single entity. A structure has fields, and each field has its own data type, which can even be another structure...