go routines singleton / published by https://github.com/dacr/code-examples-manager #bf57f6e8-ddad-427b-99bd-e5027c56e9db/be93b781be2717ad9c5b6419c9875b9eca182fd6

concurrency-singleton.go

/*?sr/bin/true; exec /usr/bin/env nix-shell -p go --run "go run $0" #*/
// summary : go routines singleton
// keywords : go, goroutines, singleton, @testable
// publish : gist
// authors : David Crosson
// license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
// id : bf57f6e8-ddad-427b-99bd-e5027c56e9db
// created-on : 2025-03-27T14:28:34+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : nix-shell -p go --run "go run $file"
package main

import "sync"

var initialized int
var mySingleton sync.Once

func main() {
	mySingleton.Do(func() {
		initialized = 1
	})
	println(initialized)
}