golang中的不定参数

variadic in golang

• 函数定义中，不定参数的类型是以...+类型
• 函数调用中，切片对象后面加上...。相当对称

We write ... after v in the nested call to Sprintln to tell the compiler to treat v as a list of arguments; otherwise it would just pass v as a single slice argument.

There's even more to printing than we've covered here. See the godoc documentation for package fmt for the details.

By the way, a ... parameter can be of a specific type, for instance ...int for a min function that chooses the least of a list of integers:

func vf(a ...int) int {
	if len(a) == 0 {
		return 0
	}
	var x int
	for _, v := range a {
		x, _ = fmt.Println(v)
	}
	return x
}
func main() {
	/*
		http.HandleFunc("/", sayhelloName)       //设置访问的路由
		err := http.ListenAndServe(":8080", nil) //设置监听的端口
		if err != nil {
			log.Fatal("ListenAndServe: ", err)
		}
	*/
	//TestNodeName()
	//GetJokes()

	slice := []int{1, 3, 4, 5}
	vf(slice...)
}

转载于:https://my.oschina.net/julian115/blog/754735