When you check out the source code both, fmt.Fprint and io.WriteString, need a writer as the first argument. Writer is an interface type which provides an Write method. And thats exactly what that functions are calling.. the Write method of your provided w (which is http.ResponseWriter in your case).
The difference is that fmt.Fprint is formatting the arguments provided first in a buffer before calling w.Write. And io.WriteString is checking if w provides the StringWriter interface and calls that instead. https://golang.org/src/fmt/print.go?s=6466:6527#L221 https://golang.org/src/io/io.go?s=10163:10218#L279 But to answer your question. In your simple case I would use io.WriteString. If you have more arguments than you could only use fmt.Fprint or you prepare your string by yourself before calling io.WriteString. Hope that helps (; Christian Sent from my iPhone > On 21. Apr 2019, at 15:59, José Colón <jec....@gmail.com> wrote: > > Hi gophers! Is it better to (w is an http.ResponseWriter) > > fmt.Fprint(w, "Hello world") > > > or to > > io.WriteString(w, "Hello world") > > > or doesfmt.Fprint use io.WriteString behind the scenes, and thus they are > equivalent? > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
