~~~ def ma(x: Int)(y:Int) = x * y ma(2)(6) println(ma(2)(6)) ~~~ ~~~ scala> def mb(x: Int) = (y: Int) => x * y mb: (x: Int)Int => Int scala> mb(2) res1: Int => Int = $$Lambda$1075/1699826397@79e7188e scala> mb(2)(7) res2: Int = 14 ~~~ 定義個默認值 ~~~ def ma(x: Int)(implicit y:Int = 100) = x * y println(ma(2)) ~~~ 隱式值導入 他會尋找同類型的,找到類型一樣的就用這個值 但是不能在多個類中找到 ~~~ object Context { implicit val aaa: Int = 1024 } object CaseDemo extends App { def ma(x: Int)(implicit y:Int = 100) = x * y import Context._ println(ma(2)) } ~~~