case-classes

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scala

There is a case class: case class MailToken(uuid: String, email: String, creationTime: DateTime, isSignUp: Boolean) And we have the class converter for Java code: public class Token { public String uuid; public String email; public DateTime creationTime; public boolean isSignUp; public MailToken toScala() { return # MISSED CODE; } public static Token fromScala(MailToken scalaToken) { Token javaToken = new Token(); javaToken.uuid = scalaToken.uuid(); javaToken.email = scalaToken.email(); javaToken.creationTime = scalaToken.creationTime(); javaToken.isSignUp = scalaToken.isSignUp(); return javaToken; } } Choose all proper options for MISSED CODE in order to convert properly Token to MailToken.

scala

case class Key(x: Int, var y: Int) val key = Key(1,2) val someMap = Map(key -> (1,2)) val newKey = key newKey.y = 3 val newMap = someMap + (newKey -> (1,3)) println(newMap(key)) What will be printed into the console?

scala

MUST NOT use "var" inside a case class

scala

Given following code: case class User(name: String, email: String, age: Int) val userLikeData = ("John", "john@doe.com", 33) Select all correct ways to instantiate User from userLikeData?

scala

Given the case class, what will be the result of calling method inside the object accessing private field of case class? class Person(val name: String, private val superheroName: String) //The superhero name is private! object Person { def showMeInnerSecret(x: Person) = x.superheroName } val clark = new Person("Clark Kent", "Superman") val peter = new Person("Peter Parker", "Spider-Man") Person.showMeInnerSecret(clark) Person.showMeInnerSecret(peter)