Scala 柯里化

在計算機科學中，柯里化（Currying）是把接受多個參數的函數變換成接受一個單一參數(最初函數的第一個參數)的函數，而且返回接受餘下的參數且返回結果的新函數的技術

def clh (a : Int )( b : Int ) = a + b       //> clh: (a: Int)(b: Int)Int
      
      var oo = clh(8)(8)                          //> oo  : Int = 16
      
      var pp = clh(2)_                            //> pp  : Int => Int = <function1>
      pp(2)                                       //> res3: Int = 4
      
     def ppppp(a : Int )(b : Int )(c : Int )(d : Int ) = a+b*c-d
                                                  //> ppppp: (a: Int)(b: Int)(c: Int)(d: Int)Int
      
      
      ppppp(2)(3)(3)(4)                           //> res4: Int = 7
      
      val l = ppppp(2)_                           //> l  : Int => (Int => (Int => Int)) = <function1>
      
      val pl = l(3)(3)(4)                         //> pl  : Int = 7