Extractor Objects (#48)

Author: khajavi

core-scala/src/main/scala/com/baeldung/scala/User.scala

@@ -0,0 +1,26 @@
+package com.baeldung.scala
+
+class User(val name: String, val age: Int)
+
+object User {
+  def apply(name: String, age: Int) = new User(name, age)
+
+  def apply(name: String) = new User(name, 0)
+
+  def unapply(u: User): Option[(String, Int)] = Some(u.name, u.age)
+}
+
+object UserMainApp extends App {
+  val user1: User = new User("John", 25)
+  val user2: User = User.apply("John", 25)
+  val user3: User = User("John", 25)
+
+  val userArgs: Option[(String, Int)] = User.unapply(user1)
+
+  user1 match {
+    case User(_, age) if age < 18 =>
+      println("You are not allowed to get a driver license.")
+    case User(_, age) if age >= 18 =>
+      println("You are allowed to get a driver's license.")
+  }
+}