Lets Tell Lies

LetsTellLies.scala

object LetsTellLies {
  def f1[A]: List[A] => Int =
    _ => util.Random.nextInt

  def f2[A]: List[A] => Int =
    f2

  def f3[A]: List[A] => Int =
    _ => {
      println("hi")
      7
  }

  def f4[A]: List[A] => Int =
    _.head.asInstanceOf[Int]

  def f5[A]: List[A] => Int =
    _.toString.length

  def f6[A]: List[A] => Int =
    l => if(l == List(1, 2, 3)) 12 else 4

  def f7[A]: List[A] => Int =
    l => if(l == null) 5 else 9

  def f8[A]: List[A] => Int = {
    case a: Seq[_] => a.length
    case _ => 8
  }

  def f9[A]: List[A] => Int =
    sys.error("bang")

  def f10[A]: List[A] => Int =
    _.hashCode

  def f11[A]: List[A] => Int =
    l => if(l.getClass.getName.startsWith("xqw")) 9 else 1

  def f12[A]: List[A] => Int = {
    l => l.notifyAll
    3
  }

  def f13[A]: List[A] => Int = {
    l => l.wait
    3
  }
}