Implicit Explicit Scala

11. Q.1 A1-A3, B1-B3 を埋めてください val m = Map("A" -> 1, "B" -> 2) m.map{case (x, y) => (y, x)} m.map{case (x, y) => x} m.map[A1, A2]({case (x, y) => (y, x) })(?:A3) m.map[B1, B2]{case (x, y) => x })(?:B3) 12. A.1 val m = Map("A" -> 1, "B" -> 2) m.map{case (x, y) => (y, x)} m.map{case (x, y) => x} m.map[(Int, String), Map[Int, String]]{ case (x, y) => (y, x) }(?:CanBuildFrom[Map[String, Int], String, M

[takc923]

なるほど？

[sugimori]

implicitは難しい