init() is a special function for module, should rename to _init()?

[Silentdoer]

[vincenzopalazzo]

can you add more content with an example too?

[Silentdoer]

in v doc:

If you want a module to automatically call some setup/initialization code when it is imported, you can use a module init function:

// this replace _init()
fn init() {
	// your setup code here ...
}
The init function cannot be public - it will be called automatically. This feature is particularly useful for initializing a C library.