Why does DI matter?

As professionals, we should never stop learning. Learning is the one true way to ensure we stay in demand and continue delivering value to our customers. Doctors, lawyers, and scientists are all highly respected professionals and all focus on continuously learning. Why should programmers be different?

In this book, we will take a journey that will start with some code that gets the job done and, by selectively applying various DI methods available in Go, together, we will transform it into something a hell of a lot easier to maintain, test, and extend.

Not everything in this book is traditional or perhaps even idiomatic, but I would ask you to try it before you deny it. If you like it, fantastic. If not, at least you learned what you don't want to do.