Scala Programming Projects

Case class

In Scala, we define most data structures using case classes. case class has one to many immutable attributes and provides several built-in functions compared to a standard class.

Type the following into the worksheet:

case class Person(name: String, age: Int)val mikaelNew = new Person("Mikael", 41)// 'new' is optionalval mikael = Person("Mikael", 41)// == compares values, not referencesmikael == mikaelNew// == is exactly the same as .equalsmikael.equals(mikaelNew) val name = mikael.name // a case class is immutable. The line below does not compile://mikael.name = "Nicolas"// you need to create a new instance using copyval nicolas = mikael.copy(name = "Nicolas")

In the preceding code, the text following // is a comment that explains ...