Minesweeper solver in scala

sweep.scala

val input = "..*\n...\n*..";

val grid = input.split("\n").map(_.toArray)

def bomb(coord: Tuple2[Int,Int]) = grid.lift(coord._1).flatMap(_.lift(coord._2)) match { 
  case Some('.') => 0; 
  case Some('*') => 1; 
  case None => 0 
}

def nearby(x:Int, y:Int) = for( rx <- x-1 to x+1; ry <- y-1 to y+1) yield (rx,ry)
def score(x:Int, y:Int) : String =  if(bomb((x,y)) == 1) " " else nearby(x,y).map(bomb).sum.toString

val cells = grid.indices.map( x => grid(x).indices.map( y => score(x,y)))
cells.foreach(x => println(x.mkString))