func listToSlice(list ps.List, arrayType reflect.Type) reflect.Value {
size := list.Size()
slice := reflect.MakeSlice(arrayType, size, size)
for i := size - 1; i >= 0; i-- {
val := reflect.ValueOf(list.Head())
slice.Index(i).Set(val)
list = list.Tail()
}
return slice
}