HackerRank: Filter Array

FilterArray.scala

package filter.array

object Main {
	def filter[T](arr: List[T], cond: T => Boolean): List[T] = arr match {
	  case x :: xs => if (cond(x)) x :: filter(xs, cond) else filter(xs, cond)
	  case _ => List[T]()
	}
	
	def f(delim: Int,arr: List[Int]): List[Int] = filter(arr, (x: Int) => x < delim)
	
	def main(args: Array[String]) {
		val filtered = f(3, List(1, 2, 3, 4, 5));
		println(filtered);
	}
}