Three new books, Go Optimizations 101, Go Details & Tips 101 and Go Generics 101 are published now. It is most cost-effective to buy all of them through this book bundle in the Leanpub book store.

About Go Generics 101

Since version 1.18, Go has supported custom generics.

This book talks about the custom generics feature of Go programming language. The content in this book includes:

A reader needs to be familiar with Go general programming to read this book. In particular, readers of this book should be familiar with Go type system, including Go built-in generics, which and Go custom generics are two different systems.

Currently, the book mainly focuses on the syntax of (and concepts in) custom generics. More practical examples will be provided when I get more experiences of using custom generics.

About GoTV

During writing this book, the tool GoTV is used to manage installations of multiple Go toolchain versions and check the behavior differences between Go toolchain versions.


The Go 101 project is hosted on Github. Welcome to improve Go 101 articles by submitting corrections for all kinds of mistakes, such as typos, grammar errors, wording inaccuracies, description flaws, code bugs and broken links.

If you would like to learn some Go details and facts every serveral days, please follow Go 101's official Twitter account @zigo_101.

The digital versions of this book are available at the following places:
Tapir, the author of Go 101, has been on writing the Go 101 series books and maintaining the website since 2016 July. New contents will be continually added to the book and the website from time to time. Tapir is also an indie game developer. You can also support Go 101 by playing Tapir's games (made for both Android and iPhone/iPad):
Individual donations via PayPal are also welcome.