Since Lists are mutable, this always makes a full copy. Prefer scala immutable Lists
if you use scala immutable lists, the tail of the result of plus is always the right argument
Linear Supertypes
Monoid[List[T]], Semigroup[List[T]], Serializable, AnyRef, Any
Since Lists are mutable, this always makes a full copy. Prefer scala immutable Lists if you use scala immutable lists, the tail of the result of plus is always the right argument