Person.hs

data Person = Person { firstName :: String, lastName :: String, age :: Int }

fullName :: Person -> String
fullName = firstName <> (const " ") <> lastName

summary :: Person -> String
summary = const "Name: " <> fullName <> const "; Age: " <> (show <$> age)

Person.scala

case class Person(firstName: String, lastName: String, age: Int) {
  
    def fullName: String = firstName ++ " " ++ lastName
  
    def summary: String = "Name: " ++ fullName ++ "; Age: " ++ age.toString
}