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- final case class Triple (posOdd: List[Int], posEven: List[Int], neg: List[Int])
- def triple(xs: List[Int]): Triple =
- xs.foldLeft(Triple(Nil, Nil, Nil))(
- (acc, x) =>
- if (x < 0)
- acc.copy(neg = x::acc.neg)
- else if (x % 2 == 0)
- acc.copy(posEven = x::acc.posEven)
- else
- acc.copy(posOdd = x::acc.posOdd)
- )
- triple(List(2, 0, -1 , 3, 5 , -2))
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