How to concatenate arrays of bytes into one array?

Question

go

messageReturn := []byte("Your message is: ")+message
    fmt.Println(string(message)) //эта строка выводит пустую строку, хотя отправляется текст
    if err := conn.WriteMessage(websocket.TextMessage, messageReturn); err != nil {
      log.Println(err)
      return
    }

Answer 1

You can use bytes.Buffer (the fastest concatenation) for Go, like this:

messageReturn := bytes.NewBufferString("Your message is: ")
messageReturn.Write(message)
conn.WriteMessage(websocket.TextMessage, messageReturn.Bytes())