// A nested case class representing an address
case class Address(city: String, zip: Int)
// A case class representing a person, containing a nested Address
case class Person(name: String, age: Int, address: Address)
// Print each person in a formatted line
def printPersons(people: Seq[Person]): Unit = {
people.foreach { p =>
println(s"${p.name} | age: ${p.age} | city: ${p.address.city} | zip: ${p.address.zip}")
}
}
// Sort persons by city, then zip, then age
def sortPersons(people: Seq[Person]): Seq[Person] = {
people.sortBy(p => (p.address.city, p.address.zip, p.age))
}
// Main entry point — required in Scala 2
object Main {
def main(args: Array[String]): Unit = {
val people: Seq[Person] = Seq(
Person("Alice", 30, Address("San Francisco", 42100)),
Person("Bob", 40, Address("Austin", 32000)),
Person("Carol", 35, Address("New York City", 42000)),
Person("Dave", 25, Address("Austin", 32000)),
Person("Eve", 28, Address("New York City", 61000))
)
val sorted = sortPersons(people)
printPersons(sorted)
}
}
/*
run:
Dave | age: 25 | city: Austin | zip: 32000
Bob | age: 40 | city: Austin | zip: 32000
Carol | age: 35 | city: New York City | zip: 42000
Eve | age: 28 | city: New York City | zip: 61000
Alice | age: 30 | city: San Francisco | zip: 42100
*/
