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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

Functions

The main elements of packages are functions, which are the subject of this section.

Type methods and functions are implemented in the same way and sometimes, the terms functions and type methods are used interchangeably.

A piece of advice: functions must be as independent from each other as possible and must do one job (and only one job) well. So, if you find yourself writing functions that do multiple things, you might want to consider replacing them with multiple functions instead.

You should already know that all function definitions begin with the func keyword, followed by the function's signature and its implementation, and that functions accept none, one, or more arguments and return none, one, or more values back. The single-most popular Go function is main(), which is used in every executable Go program—the main() function accepts no parameters and returns nothing, but it is the starting point of every Go program. Additionally...

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