How to choose a random element from an array in Scala?

Question

For example, there is a Scala array val A = Array(\"please\", \"help\", \"me\"). How to choose a random element from this array?

Answer 1

We can also add some safety with the Option monad (using the lift function, and a condition)

Actually, if you use this function on Arrays (that could be empty), your result will always be an Option.

Referencial Transparency FTW \o/

def getRandElemO[T](arr: Array[T]): Option[T] =
  if (arr.isEmpty) None
  else arr lift util.Random.nextInt(arr.length)