12 lines
231 B
Scala
12 lines
231 B
Scala
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/*
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Here is a basic list definition
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sealed trait List[+A]
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case class Cons[+A](head: A, tail: List[A]) extends List[A]
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case object Nil extends List[Nothing]
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*/
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object List {
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def add[A](as: List[A], a: A): List[A] = Cons(a, as)
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}
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