go defer / published by https://github.com/dacr/code-examples-manager #e38796ac-819e-496d-b689-27c0236b4e17/8b306935d6d781f14c75fc6b1fa5c6b1ca81f3f1

defer.go

/*?sr/bin/true; exec /usr/bin/env nix-shell -p go --run "go run $0" #*/
// summary : go defer
// keywords : go, defer, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : e38796ac-819e-496d-b689-27c0236b4e17
// created-on : 2025-03-27T10:06:35+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : nix-shell -p go --run "go run $file"
package main

import (
	"fmt"
	"os"
)

func writeHello() error {
	f, err := os.Create("/tmp/test.txt")
	if err != nil {
		return fmt.Errorf("failed to create file: %w", err)
	}
	defer f.Close()
	_, err = f.WriteString("Hello World !")
	if err != nil {
		return fmt.Errorf("failed to write file: %w", err)
	}
	return nil
}

func main() {
	writeHello()
}