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number23/lift.scala

Last active March 15, 2017 17:16
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scala lift
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lift.scala
def lift[A, B, C, D](f: Function3[A, B, C, D]): Function3[Option[A], Option[B], Option[C], Option[D]] =
(oa: Option[A], ob: Option[B], oc: Option[C]) =>
for (a <- oa; b <- ob; c <- oc) yield f(a, b, c)
def lift[A, B, C, D](f: (A, B, C) => D): (Option[A], Option[B], Option[C]) => Option[D] =
(oa: Option[A], ob: Option[B], oc: Option[C]) =>
for (a <- oa; b <- ob; c <- oc) yield f(a, b, c)
val createConnection = lift(java.sql.DriverManager.getConnection)
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