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Go Programming - From Beginner to Professional Second Edition

This is the code repository for Go Programing - From Beginner to Professional Second Edition, published by Packt.

Learn everything you need to build modern software using Go

What is this book about?

Master real-world development in “Go Programming – From Beginner to Professional”. From the basics to advanced topics, gain proficiency by mastering applications, database interactions, RESTful APIs, concurrency and more using Go idiomatic practices.

This book covers the following exciting features:

  • Understand the Go syntax and apply it proficiently to handle data and write functions
  • Debug your Go code to troubleshoot development problems
  • Safely handle errors and recover from panics
  • Implement polymorphism using interfaces and gain insight into generics
  • Work with files and connect to popular external databases
  • Create an HTTP client and server and work with a RESTful web API
  • Use concurrency to design efficient software
  • Use Go tools to simplify development and improve your code

If you feel this book is for you, get your copy today!

Instructions and Navigations

All of the code is organized into folders. For example, Chapter02.

The code will look like the following:

package main
import "fmt"
func main() {
 fmt.Println(10 > 5)
 fmt.Println(10 == 5)
}

OS Specific Instructions

  • Sometimes some of the executable generated while running "go build" may not directly work for Windows, try running"go run ." or "go run main.go"
  • For Exercise 13.03, "cat" command is OS specific, "type" command would work for Windows.
  • Running Exercise 13.04 may show some OS specific errors, replacing "echo" in code with "print" works for Windows.
  • Exercise 14.01 applies for unix-like systems (linux and macOS). Windows does not work with signals the same way so this exercise will not work for windows.

Following is what you need for this book: Designed for both complete beginners in Go as well as professionals transitioning from another programming language, this book equips developers with skills needed to build real-world projects and launch their career in Go. With a step-by-step approach, beginners can grasp Go fundamentals even without prior programming experience, and gradually advance to idiomatic Go best practices, exploring the latest features of the language.

With the following software and hardware list you can run all code files present in the book (Chapter 1-21).

Software and Hardware List

Software/ Hardware required OS required/ Other requirements
Go Compiler Windows, macOS, Linux (https://packt.live/375DQDA)
Git Windows, macOS, Linux (https://packt.live/35ByRug)
Visual Studio Code Windows, macOS, Linux (https://packt.live/35KD2Ek)
Docker Windows (https://packt.live/2EKGDG6), macOS (https://packt.live/34VJLJD), Linux
PostgreSQL Windows, macOS, Linux (https://www.postgresql.org/download/)

Errata

  • Page 4 (Paragraph 2, line 6): Complied languages should be Compiled languages
  • Page 5 ( Code block 2, line3): range of out list should be range of our list
  • Page 10 (Exercise 1.01, Step 5): rand.Seed(time.Now().UnixNano()) should be source := rand.NewSource(time.Now().UnixNano()) rng := rand.New(source)
  • Page 10 (Exercise 1.01, Step 6): r := rand.Intn(5) + 1 should be r := rng.Intn(5) + 1
  • Page 10 (Exercise 1.01, Step 6): between 0 and then should be between o and 4, then
  • Page 38 (Paragraph 1 , line 4): it's a pointer because its output starts with &. should be it's a pointer because we declared the variable with &.
  • Page 41 (Exercise 1.15, Step 4): pointer should be neglected
  • Page 164 (Paragraph 2, line 3): Go can assign a variable to a function should be Go can assign a function to a variable
  • Page 194 (Exercise 5.07, Step 4): func main() {import "fmt" should be package main counter :==4 import "fmt" func main() { counter := 4
  • Page 194 (Exercise 5.07, Step 7): I-- should be i--
  • Page 248 (Paragraph 3, line 1): implement an interface explicitly should be are implemented explicitly
  • Page 267 (3rd block of code, line 2): s interface{} should be i interface{}
  • Page 297 (Introduction, Paragraph 1): It erroneously talks about the next chapter instead of the previous. This should be In the previous chapter, we delved into the realm of Go generics, an innovative advancement in the language offering type parameters, constraints, and type inference.
  • Page 374 (1st block of code, line 2): onlAafter should be onlyAafter
  • Page 448 (st block of code, line 1 & 2): connectivity should be err

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Get to Know the Author

Samantha Coyle a Software Engineer at Diagrid, specializes in Go for cloud-native developer tooling, adept at abstracting application development challenges. Committed to Open Source, she actively contributes to projects like Dapr and Testcontainers. With a diverse background in retail computer vision solutions and successful stabilization of industrial edge use cases, particularly within biopharma data pipelines, Samantha brings invaluable expertise to her projects. Her expertise extends to being CKAD-certifi ed and reviewing Go textbooks. She is passionate about empowering early-career, diverse professionals.

Samantha is part of a family of gophers, and enjoys GopherCon with her brother and identical twin sister. A seasoned speaker, she has presented at various conferences, including GopherCon