Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Mastering Go – Third Edition
  • Table Of Contents Toc
Mastering Go – Third Edition

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
4.6 (16)
Buy this Book
close
close
Mastering Go – Third Edition

Mastering Go – Third Edition

4.6 (16)
By: Mihalis Tsoukalos
Buy this Book

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)
close
close
close
Preface
Icon
Preface
Icon
Who this book is for
Icon
What this book covers
Icon
To get the most out of this book
Icon
Get in touch
1
A Quick Introduction to Go
Icon
A Quick Introduction to Go
Icon
Introducing Go
Icon
Hello World!
Icon
Running Go code
Icon
Important characteristics of Go
Icon
Developing the which(1) utility in Go
Icon
Logging information
Icon
Overview of Go generics
Icon
Developing a basic phone book application
Icon
Exercises
Icon
Summary
Icon
Additional resources
Lock Free Chapter
2
Basic Go Data Types
Icon
Basic Go Data Types
Icon
The error data type
Icon
Numeric data types
Icon
Non-numeric data types
Icon
Go constants
Icon
Grouping similar data
Icon
Pointers
Icon
Generating random numbers
Icon
Updating the phone book application
Icon
Exercises
Icon
Summary
Icon
Additional resources
3
Composite Data Types
Icon
Composite Data Types
Icon
Maps
Icon
Structures
Icon
Regular expressions and pattern matching
Icon
Improving the phone book application
Icon
Exercises
Icon
Summary
Icon
Additional resources
4
Reflection and Interfaces
Icon
Reflection and Interfaces
Icon
Reflection
Icon
Type methods
Icon
Interfaces
Icon
Working with two different CSV file formats
Icon
Object-oriented programming in Go
Icon
Updating the phone book application
Icon
Exercises
Icon
Summary
Icon
Additional resources
5
Go Packages and Functions
Icon
Go Packages and Functions
Icon
Go packages
Icon
Functions
Icon
Developing your own packages
Icon
Using GitHub to store Go packages
Icon
A package for working with a database
Icon
Modules
Icon
Creating better packages
Icon
Generating documentation
Icon
GitLab Runners and Go
Icon
GitHub Actions and Go
Icon
Versioning utilities
Icon
Exercises
Icon
Summary
Icon
Additional resources
6
Telling a UNIX System What to Do
Icon
Telling a UNIX System What to Do
Icon
stdin, stdout, and stderr
Icon
UNIX processes
Icon
Handling UNIX signals
Icon
File I/O
Icon
Reading text files
Icon
Writing to a file
Icon
Working with JSON
Icon
Working with XML
Icon
Working with YAML
Icon
The viper package
Icon
The cobra package
Icon
Finding cycles in a UNIX file system
Icon
New to Go 1.16
Icon
Updating the phone book application
Icon
Exercises
Icon
Summary
Icon
Additional resources
7
Go Concurrency
Icon
Go Concurrency
Icon
Processes, threads, and goroutines
Icon
The Go scheduler
Icon
Goroutines
Icon
Channels
Icon
Race conditions
Icon
The select keyword
Icon
Timing out a goroutine
Icon
Go channels revisited
Icon
Shared memory and shared variables
Icon
Closured variables and the go statement
Icon
The context package
Icon
The semaphore package
Icon
Exercises
Icon
Summary
Icon
Additional resources
8
Building Web Services
Icon
Building Web Services
Icon
The net/http package
Icon
Creating a web server
Icon
Updating the phone book application
Icon
Exposing metrics to Prometheus
Icon
Developing web clients
Icon
Creating file servers
Icon
Timing out HTTP connections
Icon
Exercises
Icon
Summary
Icon
Additional resources
9
Working with TCP/IP and WebSocket
Icon
Working with TCP/IP and WebSocket
Icon
TCP/IP
Icon
The net package
Icon
Developing a TCP client
Icon
Developing a TCP server
Icon
Developing a UDP client
Icon
Developing a UDP server
Icon
Developing concurrent TCP servers
Icon
Working with UNIX domain sockets
Icon
Creating a WebSocket server
Icon
Creating a WebSocket client
Icon
Exercises
Icon
Summary
Icon
Additional resources
10
Working with REST APIs
Icon
Working with REST APIs
Icon
An introduction to REST
Icon
Developing RESTful servers and clients
Icon
Creating a functional RESTful server
Icon
Creating a RESTful client
Icon
Uploading and downloading binary files
Icon
Using Swagger for REST API documentation
Icon
Exercises
Icon
Summary
Icon
Additional resources
11
Code Testing and Profiling
Icon
Code Testing and Profiling
Icon
Optimizing code
Icon
Benchmarking code
Icon
Profiling code
Icon
The go tool trace utility
Icon
Testing Go code
Icon
Testing an HTTP server with a database backend
Icon
Fuzzing
Icon
Cross-compilation
Icon
Using go:generate
Icon
Creating example functions
Icon
Exercises
Icon
Summary
Icon
Additional resources
12
Working with gRPC
Icon
Working with gRPC
Icon
Introduction to gRPC
Icon
Defining an interface definition language file
Icon
Developing a gRPC server
Icon
Developing a gRPC client
Icon
Exercises
Icon
Summary
Icon
Additional resources
13
Go Generics
Icon
Go Generics
Icon
Introducing generics
Icon
Constraints
Icon
Defining new data types with generics
Icon
Interfaces versus generics
Icon
Reflection versus generics
Icon
Exercises
Icon
Summary
Icon
Additional resources
14
Other Books You May Enjoy
chevron up
Icon
Other Books You May Enjoy
15
Index
Icon
Index
1
Appendix A – Go Garbage Collector
Icon
Appendix A – Go Garbage Collector
Icon
Heap and stack
Icon
Garbage collection
Icon
Additional resources

Memory leaks

In the subsections that follow, we are going to talk about memory leaks in slices and maps. A memory leak happens when a memory space is allocated without being completely freed afterward.

We are going to begin with memory leaks caused by wrongly used slices.

Slices and memory leaks

In this subsection, we are going to showcase code that uses slices and produces memory leaks and then illustrate a way to avoid such memory leaks. One common scenario for memory leaks with slices involves holding a reference to a larger underlying array even after the slice is no longer needed. This prevents the GC from reclaiming the memory associated with the array.

The code in slicesLeaks.go is the following:

package main
import (
    "fmt"
    "time"
)
func createSlice() []int {
    return make([]int, 1000000)
}
func getValue(s []int) []int {
    val := s[:3]
    return val
}
func main() {
    for i := 0; i < 15; i++ {
        message := createSlice...
Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Mastering Go – Third Edition
End of Chapter 14
Next Chapter
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options
font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon