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Mastering Go – Third Edition
Mastering Go – Third Edition

Mastering Go – Third Edition: Harness the power of Go to build professional utilities and concurrent servers and services , Third Edition

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Mastering Go – Third Edition

Basic Go Data Types

Data is stored and used in variables and all Go variables should have a data type that is determined either implicitly or explicitly. Knowing the built-in data types of Go allows you to understand how to manipulate simple data values and construct more complex data structures when simple data types are not enough or not efficient for a given job.

This chapter is all about the basic data types of Go and the data structures that allow you to group data of the same data type. But let us begin with something more practical: imagine that you want to read data as command-line arguments of a utility. How can you be sure that what you have read was what you expected? How can you handle error situations? What about reading not just numbers and strings but dates and times from the command line? Do you have to write your own parser for working with dates and times?

This chapter will answer all these questions and many more by implementing the following three utilities:

  • A command-line utility that parses dates and times
  • A utility that generates random numbers and random strings
  • A new version of the phone book application that contains randomly generated data

This chapter covers:

  • The error data type
  • Numeric data types
  • Non-numeric data types
  • Go constants
  • Grouping similar data
  • Pointers
  • Generating random numbers
  • Updating the phone book application

We begin this chapter with the error data type, because errors play a key role in Go.

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Key benefits

  • This third edition of the bestselling guide to advanced Go programming has been overhauled and expanded to cover RESTful servers, the WebSocket protocol, and Go generics
  • Use real-world exercises to build high-performance network servers and powerful command line utilities
  • Packed with practical examples and utilities to apply to your own development work and administrative tasks
  • Get clear explanations about Go nuances and features to simplify Go development

Description

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.

Who is this book for?

You’ll need to know the basics of Go before you get started with this book, but beyond that, anyone can sink their teeth into it. It’s written primarily for Go programmers who have a bit of experience with the language and want to become expert practitioners.

What you will learn

  • Use Go in production
  • Write reliable, high-performance concurrent code
  • Manipulate data structures including slices, arrays, maps, and pointers
  • Develop reusable packages with reflection and interfaces
  • Become familiar with generics for effective Go programming
  • Create concurrent RESTful servers, and build gRPC clients and servers
  • Define Go structures for working with JSON data

Product Details

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Publication date : Aug 31, 2021
Length: 682 pages
Edition : 3rd
Language : English
ISBN-13 : 9781801073011
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Product Details

Publication date : Aug 31, 2021
Length: 682 pages
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Table of Contents

15 Chapters
A Quick Introduction to Go Chevron down icon Chevron up icon
Basic Go Data Types Chevron down icon Chevron up icon
Composite Data Types Chevron down icon Chevron up icon
Reflection and Interfaces Chevron down icon Chevron up icon
Go Packages and Functions Chevron down icon Chevron up icon
Telling a UNIX System What to Do Chevron down icon Chevron up icon
Go Concurrency Chevron down icon Chevron up icon
Building Web Services Chevron down icon Chevron up icon
Working with TCP/IP and WebSocket Chevron down icon Chevron up icon
Working with REST APIs Chevron down icon Chevron up icon
Code Testing and Profiling Chevron down icon Chevron up icon
Working with gRPC Chevron down icon Chevron up icon
Go Generics Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

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Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.6
(16 Ratings)
5 star 87.5%
4 star 0%
3 star 6.3%
2 star 0%
1 star 6.3%
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Gigi Sayfan Sep 27, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I received a review copy of the book and I enjoyed it thoroughly. The author does a great job covering the Go language from the basics all the way to advanced concepts. In particularly, I appreciated the chapter on templates (coming in Go 1.18). It is one of the features I personally wait for. The author's style is very engaging. He explains the concepts concisely, yet in detail and demonstrates with code samples. I highly recommend it to beginners as well as seasoned Go developers.
Amazon Verified review Amazon
Samuel Stegall Sep 18, 2022
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Mastering Go is a book that I picked up recently, in order to develop better APIs than I was able to with Node.js. Mastering Go is designed as a book that teaches Go holistically, first teaching the fundamentals of the language, then teaching common software engineering concepts as they relate to Go, such as multithreading, testing, profiling, and writing APIs. I really liked the exercises and additional resources that the book provided at the end of each chapter, because they helped me go from writing the bare-minimum amount of Go code to cover each concept, to writingmany programs with Go to gain a deeper understanding of the language.With this book, I have learned quite a bit about Go. I have learned how to make REST APIs. With some additional study, I've even learned how to connect with databases in order to have a persistent data store linked to my API. Overall, learning Go with Mastering Go has been a pleasure, because it has taught me a new programming language, allowed me to learn exactly what I intended regarding REST APIs, and now I have a new tool in my tool belt. There's also a lot about other networking services in the book, including writing TCP and UDP clients, and working with gRPC. I believe that this information is going to come in handy for me down the line.I plan on using Go to create my own full-stack video streaming site for software demos, and learning the language via Mastering Go is going to make it fairly simple to create the REST API side of this app. I feel comfortable using Go for production-grade applications, and I hope to use it in my projects in the future.
Amazon Verified review Amazon
MT Sep 22, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Go is a beautiful programming language and this book makes the learning of Go easier.Have in mind that you still need to write your own programs to learn Go. No book can replace practice.
Amazon Verified review Amazon
BishTechIT Nov 25, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
The book feels more like a journal than a tech manual. the golang use case and it's origin story is compelling.
Amazon Verified review Amazon
Sunny Mittal Jan 24, 2022
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Mastering Go is truly a great resource for learning and mastering the Go programming language. I don't use Go professionally but have always wanted to really learn it well to no avail. I decided to finally sit down and spend some focused time with this book and few distractions to patch gaps in the knowledge I've acquired over the years and have finally been able to grasp concepts that evaded me previously. I'm particularly interested in Go's concurrency model which seemed so mysterious before but has finally clicked with the help of this book. One piece of advice for anyone using this book to learn Go is to download the source code when it's omitted for brevity in a chapter but type up as much as you can on your own while reading the relevant explanations given by the authors. What I really love about Mastering Go is that code is not shown in its entirety and then explained from the top down; it's explained (mostly) line by line which helps a lot when coming from a language like JavaScript or Ruby (like me), which oftentimes can be explained top down with no loss of understanding. Go's a different beast which is what makes it such a great language to learn. Like any language, it requires dedication to really learn properly, but the Go team has managed to create an amazingly terse language to solve a variety of programming challenges, keeping performance in mind all along. I highly recommend learning Go and absolutely recommend Mastering Go as a resource in that adventure.
Amazon Verified review Amazon
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