res.Datas[i]interface{}
if t, ok := res.Datas[i].(time.Time); ok {
// it is of type time.Time
// t is of type time.Time, you can use it so
} else {
// not of type time.Time, or it is nil
}
time.Timetime.Time
if _, ok := res.Datas[i].(time.Time); ok {
// it is of type time.Time
} else {
// not of type time.Time, or it is nil
}
time.Time*time.Timetime.Time