Array is a special kind of collection in Scala. On the one hand, Scala arrays correspond one-to-one to Java arrays. That is, a Scala array Array[Int] is represented as a Java int[], an Array[Double] is represented as a Java double[] and a Array[String] is represented as a Java String[]. But at the same time, Scala arrays offer much more than their Java analogues. First, Scala arrays can be generic. That is, you can have an Array[T], where T is a type parameter or abstract type. Second, Scala arrays are compatible with Scala sequences - you can pass an Array[T] where a Seq[T] is required. Finally, Scala arrays also support all sequence operations. Here’s an example of this in action:
This is a companion discussion topic for the original entry at http://docs.scala-lang.org//overviews/collections/arrays