Method of

Method to create an IntList from an argument list. You don't have to understand this code. We have it here because it's convenient with testing. It's used like this: IntList myList = IntList.of(1, 2, 3, 4, 5); will create an IntList 1 -> 2 -> 3 -> 4 -> 5 -> null. You can pass in any number of argu

(int ...argList)