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dmyersturnbull/UnorderedPair.scala

Created March 21, 2016 20:29
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Unordered pair in Scala
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UnorderedPair.scala
case class UnorderedPair[A](a: A, b: A) {
override def equals(o: Any) = o match {
case that: UnorderedPair[A] => that.a == a && that.b == b || that.a == b && that.b == a
case _ => false
}
override def hashCode = a.hashCode * b.hashCode // commutative and unique
}
@jakequist
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Thanks!

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