By teaching familiar implementations found in Ruby, you will see the correlation between the two languages, establishing familiar concepts to give you enough knowledge to be comfortable with Go and to start programming with it.
Imagine that you like to learn a new programming language, and you start by leveraging what you already know and bridge the gap in learning specific parts of the new language. This book was created on that idea, it starts with using my existing language knowledge and experience to breakdown Go into familiar Ruby concepts and implementations.
By teaching familiar implementations found in Ruby, you will see the correlation between the two languages, establishing familiar concepts to give you enough knowledge to be comfortable with Go and to start programming with it.
In today's world of cloud native microservices, containerized architectures, You can be up-to-date with a knowledge in Go. Many notable open-source projects are built using Go (i.e. Docker, Kubernetes, Ethereum and Terraform to name a few), and those platforms have APIs and SDKs readily available natively for you to use. And many global companies have been using Go in production (i.e. Google, Netflix, Dropbox, Heroku and Uber to name a few), proving that it has been battle-tested and powerful mature language to based your work into.
This book was made with a Rubyist in mind, all the learning metaphors are based on Ruby and I think it will help you to learn Go programming language when you already knows Ruby. Go can be your second or third programming language and this book can help you get started.