Clean package setup in Go using the init function

Published: 22 May 2026
on channel: Flo Woelki

5,064

294

This video will quickly explain what the init function in Go does. If you are interested in the new Peek method in Go 1.26, feel free to check out this video:    • Simplifying tokenization with Go 1.26's ne...

📝 Description
Master one of Go's most unique and powerful features: the `init` function. In this practical tutorial, we explore how this special function allows you to execute setup logic automatically before your `main` function even begins. We will break down exactly how `init` works, why it is essential for patterns like dependency registration, and the crucial rules regarding its execution order. By the end, you will know exactly how to implement clean, decoupled initialization logic without creating debugging nightmares. Here's what you will learn:
• Understand what the `init` function is, its unique characteristics, and exactly when it runs during package initialization.
• Discover the rules of execution order when using multiple `init` functions, both within a single source file and across different files in the same package.
• Learn how to build a decoupled central registry pattern by using `init` to automatically register a JSON codec just by importing a package.
• Master compile-time safety checks using the blank identifier to guarantee your structs satisfy interfaces, ensuring your decoupled packages never break silently.
• Apply best practices for when to use `init` for tasks like setting up global variables, and learn which complex side effects you must avoid to keep your code maintainable.

⏳ Timestamps:
00:00 - Introduction
00:12 - What is init?
00:48 - Use case
09:35 - Outro

👋 Hey there!
If you are new to this channel: Hey 👋 my name is Flo and I am a professional software engineer with a passion for coding in Golang, TypeScript, JavaScript, and Rust. This channel is where I share that passion and dive into the exciting world of software engineering.

📨 Support and Connect!
Become a member.    / @flowoelki
Discord:   / discord
X / Twitter: https://x.com/FlorianWoelki
LinkedIn:   / florian-woelki
GitHub: https://github.com/FlorianWoelki

📝 Copyright Notice
The original Go Gopher was designed by Renée French (Source: https://go.dev/blog/gopher License details: https://creativecommons.org/licenses/.... The gopher appearing in this video and thumbnail has been modified from the original design and is based on an illustration from Maria Letta's free-gophers-pack (Source: https://github.com/MariaLetta/free-go... License: CC0 1.0 Public Domain https://creativecommons.org/publicdom....

#go #init #function

On this page of the site you can watch the video online Clean package setup in Go using the init function with a duration of hours minute second in good quality, which was uploaded by the user Flo Woelki 22 May 2026, share the link with friends and acquaintances, this video has already been watched 5,064 times on youtube and it was liked by 294 viewers. Enjoy your viewing!