如何在GO中检查切片是否在切片中？

Question

I have the following code:

func main(){
    l1 := []string{"a", "b", "c"}
    l2 := []string {"a", "c"}
    //l2 in l1?
}

I can check this using loops and flags but Is there a simple way to check if l2 is inside l1 like python command "l2 in l1"?

Answer 1

Following from How to check if a slice is inside a slice in GO?, @Mostafa posted the following for checking if an element is in a slice:

func contains(s []string, e string) bool {
   for _, a := range s {
        if a == e {
            return true
        }
    }
    return false
}

Now it's a matter of checking element by element:

func subslice (s1 []string, s2 []string) bool {
    if len(s1) > len(s2) { return false }
    for _, e := range s1 {
        if ! contains(s2,e) {
            return false
        }
    }
    return true
}

Of course, this ignores duplicates, so there's room for improvement.