How to suppress “match is not exhaustive!” warning in Scala

Question

How can I suppress the \"match is not exhaustive!\" warning in the following Scala code?

val l = \"1\" :: \"2\" :: Nil
l.sliding(2).foreach{case List(a,b) =&         


        

Answer 1

Since your sliding(2) can possibly return one last list with only one element in it, you should also test it:

l sliding(2) foreach {
  case a::b::Nil => println("two elements: " + a + b)
  case l         => println("one last element" + l.head)
}