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December 19, 2015 06:29
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| object Lisst { | |
| def apply[A](a: A): Lisst[A] = NonEmptyLisst(a, EmptyLisst) | |
| } | |
| private case class NonEmptyLisst[+A]( | |
| head: A, | |
| tail: Lisst[A]) | |
| extends Lisst[A] | |
| private case object EmptyLisst extends Lisst[Nothing] |
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