• List are constructed simply using List(element1, element2, ...)

• List elements can be of any type, but the List final type will be the lowest common denominator

  class Foo(val value1:Int)
  class Bar(value1:Int, val value2:Int) extends Foo(value1)
  val list:List[Foo] = List(new Foo(1), new Bar(2,3))
  

• The default List in scala, is scala.List which points to scala.collection.immutable.List src docs, and defined in scala/package.scala src docs
• The default List is implemented as a Linked list
• It is immutable (any “changes” craete a new list, the original is untouched)

See Also opens in new page

• List's scala docs
• scala package object docs