flip flop

flipflop.scala

def flipFlopChain: List[Boolean] => List[Boolean] =
  case Nil =>  Nil
  case a :: rest =>
    val a1 = !a
    val rest1 = if a1 then flipFlopChain(rest) else rest
    a1 :: rest1

def chainToString(l: Seq[Boolean]): String =
  String(l.toArray.map { case true => '1'; case false => '0' })

@main def testFlipFlop =
  val numFlipFlops = 64
  val startState = List.fill(numFlipFlops)(false)
  Stream
    .iterate(startState)(flipFlopChain)
    .map(chainToString)
    .map(_ + "\r")
    .foreach(print)