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:

custom generic syntax,
type constraints and type parameters,
type arguments and type inference,
how to write valid custom generic code,
current implementation/design restrictions.

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.

(more articles ↡)

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:

Leanpub store, $7.99+ ($7.99 is the minimum book price at Leanpub. It is more cost-effective to buy this book from this or this book bundle).
Amazon Kindle store, $5.99.
Apple Books store, $5.99.
Google Play store, $5.99.

Tapir, the author of Go 101, has been on writing the Go 101 series books and maintaining the go101.org 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):

Color Infection (★★★★★), a physics based original casual puzzle game. 140+ levels.
Rectangle Pushers (★★★★★), an original casual puzzle game. Two modes, 104+ levels.
Let's Play With Particles, a casual action original game. Three mini games are included.

Individual donations via PayPal are also welcome.

Articles in this book:

Acknowledgements
About Go Generics 101
About Go Custom Generics
First Look of Custom Generics
Constraints and Type Parameters
Generic Instantiations and Type Argument Inferences
Operations on Values of Type Parameter Types
The Status Quo of Go Custom Generics
Some Examples Using Go Custom Generics (to do)