|
|
|
|
|
|
by paulddraper
2410 days ago
|
|
|
Or, use Maybe/Option and have as many levels of nonexistence as you want. Option[Option[Option[T]]]
Not that it would necessarily be very useful, but choosing 2 values of nonexistence is very arbitrary.Usually zero or one level of nonexistence is enough. |
|
|