如何在不使用日志的情况下在Go中打印到Stderr

Question

How can I write a message to Stderr without using log?

A comment in this SO post shows how to do it with log: log.Println("Message"), but what if I don't want a timestamp?

Is the following good Go?

os.Stderr.WriteString("Message")

Answer 1

If you don't want timestamps, just create a new log.Logger with flag set to 0:

l := log.New(os.Stderr, "", 0)
l.Println("log msg")

EDIT:

Is the following good Go?

os.Stderr.WriteString("Message")

This is acceptable, and you can also use fmt.Fprintf and friends to get formatted output:

fmt.Fprintf(os.Stderr, "number of foo: %d", nFoo)