关于google:golang-rune类型

golang中rune类型

    在golang中rune等同于int32,只是个别用于字符转换。golang中len()办法次要计算数组长度。golang中默认存储字符串是采纳utf8格局，utf8采纳变长字节存储，英文字母是单字节存储，中文是3个字节存储，所以-1和-2的执行后果是16和15。golang中有utf8.RuneCountInString和[]rune()两种形式将utf8转换成4个字节的int32存储，而后计算int32数组的长度。

 -1 address := "this is shanghai" fmt.Println("len(address):",len(address))  -2 address := "this is shanghai" fmt.Println("len(address):",len(address))  -3 addressThree := "这是在上海"      fmt.Println("len(address):",utf8.RuneCountInString(addressThree)) -4 fmt.Println("len(address):",len([]rune(addressThree)))

后果

-1 len(address): 16-2len(address): 15-3len(address): 5-4len(address): 5