函数柯理化

package spark.demo

object MyApp {
  def main(args: Array[String]): Unit = {
    // 函数柯理化
    val multiFunc        = (a: Int, b: Int) => a * b
    val multiFuncCurried = (a: Int) => ((b: Int) => a * b)

    println(multiFunc(3, 5))        // 3 * 5 = 15
    println(multiFuncCurried(3)(5)) // 3 * 5 = 15

    val double  = multiFuncCurried(2) // double  = (b: Int) => 2 * b
    val tripple = multiFuncCurried(3) // tripple = (b: Int) => 3 * b

    println(double(5))  // 2 * 5 = 10
    println(tripple(5)) // 3 * 5 = 15
  }
}