go Join()
Join()方法语法
func Join(a []string, sep string) string
go源码对Join()方法的介绍：
Join concatenates the elements of its first argument to create a single string. The separator string sep is placed between elements in the resulting string.即，golang的strings.Join()方法，可以将元素为字符串的切片a用sep为连接符链接成一个字符串，并以新的字符串作为值返回。
strings.Join()方法实例代码
func main() {
var a []string = []string{"笨鸟工具", "x1y1z1.com"}
var str string = strings.Join(a, "——")
fmt.Println(str)
}运行go文件，得到输出：
笨鸟工具——x1y1z1.com