Go, from the beginning
Go, from the beginning
from o to hero
About the Book
This book is meant to be free.
Table of Contents
-
Your first program
- Introduction
- A history of Go
- What is it used for though?
- References
- Features
- Install Go
- A Go program
- Commands
- Summary
- 🚀 Challenge
- Review & Self Study
- Assignment
- Solution
-
Using variables
- Introduction
- Declare variables
- Assign variables
- Data types
- String interpolation
- Assignment - define some variables and print them out
- 🚀 Challenge
- Review & Self Study
- Solution
-
Flow control
- Introduction
- Flow control
-
The
if
construct -
Using
else if
- Multiple expressions
- Assignment - create a program that tests your Boolean logic
- 🚀 Challenge
- Solution
- Review & Self Study
-
Converting between types
- Introduction
- Why convert between types
- Use case - command-line arguments
-
Convert from string to int with
strconv
- Parse string to int
- Integer to string
- Additional parsing
- Assignment
- Solution
- 🚀 Challenge
-
Working with loops
- Introduction
- The case for looping statements
-
The
for
loop -
Repeat until the condition is met with
while
- Using for-each over a range
-
Controlling the loop with
continue
andbreak
- Assignment - create a command line loop
- 🚀 Challenge
- Solution
-
Reading user input
- Introduction
- User input
-
Managing user input with
fmt
- Reading one input
- Reading multiple inputs
-
Scanf()
, scan the input with formatters - Learn more
- Assignment - read user input
- 🚀 Challenge
- Solution
-
Using functions
- Introduction
- Why functions
-
Your first function
main()
- The anatomy of a function
- Adding a return type
- Multiple returns
- Assignment - adding a function to a program
- Solution
-
Handling errors
- Introduction
- Errors
-
Crash the program with
panic()
- Improve the error handling
-
Use the error pattern with the
errors
package - Assignment I - add error handling
- Solution I
- Assignment II - improve error logging
- Solution II
-
Arrays and slices
- Introduction
- Arrays
- Declare an array
- Accessing elements
- Length and capacity
- Slices
- Assignment - store log entries
- Solution
-
Structs
- Introduction
- Why structs
- Defining a struct
- Embedding a struct
- Adding implementation to structs
- Assignment - defining a struct
- Solution
-
Using maps
- Introduction
- The use case for a map
- Creating a map
- Read a value by key
- Iterate over a map
- Delete an entry
- Assignment - build a phone book
- Solution
- Challenge
-
Interfaces
- Introduction
- Interface
- Interface - describing a behaviour
- Implement an interface
- Type assertions
- Change a value
- Assignment
- Solution
-
Your first project
- Introduction
- Module use cases
- Consume internal files
- Creating a project
- The import statement
- Assignment - create a project
- Solution
- Challenge
-
Consume an external module
- Introduction
- External module
- Import module
- Use it in code
- Assignment - consume an external module
- Solution
- Challenge
-
Create a module meant for sharing
- Introduction
- Create a module
- Assignment - create a module meant for sharing and consume it
- Challenge
-
Test your code in Go
- Introduction
- Why we test
- What Go provides
- Your first test
- Control the test run
- Coverage
- Learn more
- Challenge
-
Working with JSON
- Introduction
- JSON
- Reading JSON
- Writing JSON
- Assignment
- Solution
- 🚀 Challenge
- Learn more
-
Build a Web API
- Introduction
- Web API
-
The
net/http
library - Responding to a request
- Working with the request
- ServeMux, a better way
- Assignment - build a first web app
- Solution
- Challenge
-
Better logging with a logging library
- Introduction
- Reasons to log
- What to log
-
Using
log
- Assignment
- Solution
-
Working with strings
- Handling special characters
-
Inspect with
Contains()
-
Parsing with
Split()
- Presentation
- Assignment
- Solution
-
Use regular expressions to parse text
- What is RegEx and what to use it for
- Why use RegEx
- Where is it used ?
- Your first RegEx
- Character classes
- Repetition
- Anchors and boundaries
- Groups
- Named groups
- Assignment - create a Go program that parses a URL
- Replacing
- Assignment - replace content
- Solution II
-
Goroutines and channels
- Introduction
- Concurrency, what’s the benefit
- Goroutines
- Channels
-
Assignment -
SearchFiles()
with channels - Challenge
- Solution
-
Working with a database
- Introduction
- Select a sqlite driver
-
Use
sqlite3
from the console - Talking to your database via Go.
- Assignment
- Solution
-
Read and write to files
- Introduction
- Read a text file
- Write text to a file
- Append to a file
- Assignment
- Solution
- Challenge
-
Perform operations on files and directories
- Introduction
- File information
- Copy file
- Rename
- Remove file
- Create dir
- Read dir
- Assignment
- Solution
The Leanpub 60-day 100% Happiness Guarantee
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Do Well. Do Good.
Authors have earned$11,707,309writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
CQRS by Example
Carlos Buenosvinos, Christian Soronellas, and Keyvan Akbary- Leverage your Software Architecture skills by learning everything about CQRS in detail with lots of examples
- Develop faster applications by applying CQRS and fostering Read Models and Projections
- Learn how to apply CQRS into a brownfield project from a pragmatic approach
Recipes for Decoupling
Matthias NobackWrite software that survives
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
OpenIntro Statistics
David Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntroA complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
C++20 - The Complete Guide
Nicolai M. JosuttisAll new language and library features of C++20 (for those who know previous C++ versions).
The book presents all new language and library features of C++20. Learn how this impacts day-to-day programming, to benefit in practice, to combine new features, and to avoid all new traps.
Buy early, pay less, free updates.
Other books:
Functional Event-Driven Architecture
Gabriel VolpeExplore the event-driven architecture (EDA) in a purely functional way. Learn to design and develop distributed systems that scale. Identify common design patterns in such systems.
Take your functional programming skills to the next level by joining me in developing a distributed system powered by Apache Pulsar and Fs2 streams, all in Scala 3!
The PowerShell Scripting and Toolmaking Book
Don Jones and Jeff HicksLearn the patterns, practices, and details of PowerShell Scripting and Toolmaking from the industry's two most recognized experts on the subject.
Mastering STM32 - Second Edition
Carmine NovielloWith more than 1200 microcontrollers, STM32 is probably the most complete ARM Cortex-M platform on the market. This book aims to be the first guide around that introduces the reader to this exciting MCU portfolio from ST Microelectronics and its official CubeHAL and STM32CubeIDE development environment.
R Programming for Data Science
Roger D. PengThis book brings the fundamentals of R programming to you, using the same material developed as part of the industry-leading Johns Hopkins Data Science Specialization. The skills taught in this book will lay the foundation for you to begin your journey learning data science. Printed copies of this book are available through Lulu.
On Java 8
Bruce EckelBy the author of "Thinking in Java," covering version 8 of the Java programming language (with updates to Java 17). Intended for “dedicated beginners,” it doesn’t assume you know anything about programming and takes you through the material step-by-step. However, I assume you are able to figure things out. It’s not a “dummies” or “idiot’s” guide.
Top Bundles
- #1
Software Architecture
2 Books
"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before... - #3
CCIE Service Provider Ultimate Study Bundle
2 Books
Piotr Jablonski, Lukasz Bromirski, and Nick Russo have joined forces to deliver the only CCIE Service Provider training resource you'll ever need. This bundle contains a detailed and challenging collection of workbook labs, plus an extensively detailed technical reference guide. All of us have earned the CCIE Service Provider certification... - #4
All the Books of The Medical Futurist
6 Books
We put together the most popular books from The Medical Futurist to provide a clear picture about the major trends shaping the future of medicine and healthcare. Digital health technologies, artificial intelligence, the future of 20 medical specialties, big pharma, data privacy, digital health investments and how technology giants such as Amazon... - #6
Pattern-Oriented Memory Forensics and Malware Detection
2 Books
This training bundle for security engineers and researchers, malware and memory forensics analysts includes two accelerated training courses for Windows memory dump analysis using WinDbg. It is also useful for technical support and escalation engineers who analyze memory dumps from complex software environments and need to check for possible... - #8
Practical FP in Scala + Functional event-driven architecture
2 Books
Practical FP in Scala (A hands-on approach) & Functional event-driven architecture, aka FEDA, (Powered by Scala 3), together as a bundle! The content of PFP in Scala is a requirement to understand FEDA so why not take advantage of this bundle!? - #10
The Python Craftsman
3 Books
The Python Craftsman series comprises The Python Apprentice, The Python Journeyman, and The Python Master. The first book is primarily suitable for programmers with some experience of programming in another language. If you don't have any experience with programming this book may be a bit daunting. You'll be learning not just a programming...