Case Classes
Case Classes
if (point == anotherPoint) {
println(point + " and " + anotherPoint + " are the same.")
} else {
println(point + " and " + anotherPoint + " are different.")
} // Point(1,2) and Point(1,2) are the same.
if (point == yetAnotherPoint) {
println(point + " and " + yetAnotherPoint + " are the same.")
} else {
println(point + " and " + yetAnotherPoint + " are different.")
} // Point(1,2) and Point(2,2) are different
Is like regular classes with a few key differences which we will go over. It is good for modeling immutable data. .
Case Classes → are a → Classes.
Defining a case class
A minimal case class requires the keywords case class, an identifier, and a parameter list (which may be empty).
Copying Case Class
case class Message(sender: String, recipient: String, body: String)
val message4 = Message("julien@bretagne.fr", "travis@washington.us", "Me zo o komz gant ma amezeg")
val message5 = message4.copy(sender = message4.recipient, recipient = "claire@bourgogne.fr")
message5.sender // travis@washington.us
message5.recipient // claire@bourgogne.fr
message5.body // "Me zo o komz gant ma amezeg"