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milessabin/gist:3880993

Created October 12, 2012 19:26
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Poly1 examples
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gistfile1.scala
object grow extends Poly1 {
implicit def casePuppy = at[Puppy](_.grow)
implicit def caseKitten = at[Cat](_.grow)
}
val y = Puppy() :: Kitten() :: HNil
val a = y map grow
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