Partial updates with immutable domain objects

PartialUpdateToImmutableObject.scala

case class Person(val firstName: String, val lastName: String, val age: Int, val email: String) {
	def update(firstName: String = firstName, lastName: String = lastName, age: Int = age, email: String = email) : Person = {
		Person(firstName, lastName, age, email)
	}
}

val seedPerson = Person("A", "B", 1, "me@home.com")
println(seedPerson)

val updatedPerson = seedPerson update (age = 100, firstName = "Z")
println(updatedPerson)