ilcavero

### Keybase proof

I hereby claim:

  * I am ilcavero on github.
  * I am ilcavero (https://keybase.io/ilcavero) on keybase.
  * I have a public key whose fingerprint is 4A8B 72C8 E22E 06EC 2C29  60FF 14F3 DD51 EA12 2782

To claim this, I am signing this object:

ilcavero

sealed abstract class Determine[+A] {
  def map[B](f: A => B): Determine[B]
  def flatMap[B](f: A => Determine[B]): Determine[B]
  def filter(p: A => Boolean): Determine[A]
  def foreach(b: A => Unit): Unit
}
final case class Known[+A](value: A) extends Determine[A] {
  def map[B](f: A => B): Determine[B] = Known(f(value))
  def flatMap[B](f: A => Determine[B]): Determine[B] = f(value)