# [17\. 电话号码的字母组合](https://leetcode-cn.com/problems/letter-combinations-of-a-phone-number/)
~~~
func TestDemo17(t *testing.T) {
data := []int{1,2,3}
fmt.Println(data[2:])
//data := []interface{} {"abc","abd","ghi"}
//js(data)
}
func js(data []interface{}) {
switch data[0].(type) {
case string:
rest := []string{}
for _,v := range data[0].(string) {
for _,v2 := range data[1].(string) {
dat := string(v) + string(v2)
rest = append(rest,dat)
dats := data[1:]
}
}
case []string:
rest := []string{}
for _,v := range data[0].([]string) {
for _,v2 := range data[1].(string) {
dat := string(v) + string(v2)
rest = append(rest,dat)
data[0] = rest
}
}
}
if len(data) > 1 {
js(data)
}else{
fmt.Println(data)
}
}
~~~
