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Mastering Go – Third Edition

You're reading from   Mastering Go – Third Edition Harness the power of Go to build professional utilities and concurrent servers and services

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Product type Paperback
Published in Aug 2021
Publisher Packt
ISBN-13 9781801079310
Length 682 pages
Edition 3rd Edition
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Author (1):
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Mihalis Tsoukalos Mihalis Tsoukalos
Author Profile Icon Mihalis Tsoukalos
Mihalis Tsoukalos
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Table of Contents (17) Chapters Close

Preface 1. A Quick Introduction to Go 2. Basic Go Data Types FREE CHAPTER 3. Composite Data Types 4. Reflection and Interfaces 5. Go Packages and Functions 6. Telling a UNIX System What to Do 7. Go Concurrency 8. Building Web Services 9. Working with TCP/IP and WebSocket 10. Working with REST APIs 11. Code Testing and Profiling 12. Working with gRPC 13. Go Generics 14. Other Books You May Enjoy
15. Index
Appendix A – Go Garbage Collector

Go packages

Everything in Go is delivered in the form of packages. A Go package is a Go source file that begins with the package keyword, followed by the name of the package.

Note that packages can have structure. For example, the net package has several subdirectories, named http, mail, rpc, smtp, textproto, and url, which should be imported as net/http, net/mail, net/rpc, net/smtp, net/textproto, and net/url, respectively.

Apart from the packages of the Go standard library, there are external packages that can be imported using their full address and that should be downloaded on the local machine, before their first use. One such example is https://github.com/spf13/cobra, which is stored in GitHub.

Packages are mainly used for grouping related functions, variables, and constants so that you can transfer them easily and use them in your own Go programs. Note that apart from the main package, Go packages are not autonomous programs and cannot be compiled into...

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