optional-argments

// see https://qiita.com/weloan/items/56f1c7792088b5ede136
package main

import (
	"fmt"
)


type Server struct {
    timeout int
    address string
    port int
}

func (server *Server) Call() {
    fmt.Printf("Call To %s:%d with %d sec timeout \n", server.address, server.port, server.timeout);
}

type Option func(*Server)Option


func NewServerWithOptions(options ...Option) *Server {
    var server = &Server{}

   for _, option := range options {
       option(server)
   }

    return server
}
func NewServer(timeout int, address string, port int) *Server {


    return &Server {
        timeout: timeout,
        address: address,
        port: port,
    }
}

func main() {
    var server = NewServer(30, "localhost", 25)
    server.Call()

    test("囁き", "詠唱", "念じろ！")
}

func test(words ...string) {
    for _, word := range words {
        fmt.Printf("%s \n", word)
  
    }
}