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afsalthaj/block5.scala Secret

Created June 29, 2018 06:50
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block5.scala
case class Something(value: Int)
// We have implicit EncodeJson available for Int.
def toJson(a: Int) = EncodeJson[Int].toJson(a)
def toJson(a: Something): EncodeJson[Something] =
EncodeJson[Int].contramap { _.value }
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