golang字符串

• 字符串长度

  str := "acbd"len := len(str)

• 第几个字符

  str := "abcd"first := str[0] 

• 子串

  str := "abcd"sub := str[1:3]

• 遍历

   str := "abcd"for index, char := range str {    fmt.Printf("%d %c\n",index,char)}

• 连接
  1.快

      var buf bytes.Buffer    buf.WriteString("hello ")    buf.WriteString("world")    fmt.Println(buf.String()) //hello world

  2.方便

  str := "hello"str += "world"