Scala Reactive Programming

Scala List

In the Scala Collection API, List is a LIFO-based immutable Collection which represents an ordered linked list (where LIFO stands for Last In First Out). It is available as scala.collection.immutable.List.

It has two implementation case classes, scala.Nil and scala.:: as shown here:

sealed abstract class List[+A] 
object List 
final case class :: extends List[B] 
case object Nil extends List[Nothing] 

Let's explore it with some examples:

scala> val numberList = List(1,2,3,4) numberList: List[Int] = List(1, 2, 3, 4) scala> number numberList numbersList scala> number numberList numbersList scala> numberList.map(x=> x.toString) res0: List[String] = List(1, 2, 3, 4) scala> val strList = "One" :: "Two" :: Nil strList: List[String] = List(One, ...