Scala example source code file (transpose.scala)

This example Scala source code file (transpose.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

array, illegalargumentexception, illegalargumentexception, list, list, nil, nil, null, t, test, test, unit

The Scala transpose.scala source code

object Test {
  def wrap[T >: Null](body: => T) = 
    try body
    catch { case _: IllegalArgumentException => null }
  
  def main(args: Array[String]): Unit = {
    assert(wrap(Nil.transpose) == Nil)
    assert(wrap(List(List(1, 2), List(1)).transpose) == null)
    assert(wrap(List(List(1), List(1, 2)).transpose) == null)
    assert(wrap(List(List(1, 2), List(1, 2)).transpose) == List(List(1, 1), List(2, 2)))
  }
}