Scala偏函数

def main(args: Array[String]){
    val data = List(1, 2, 3, 4, 5, 6)
    data.foreach(println _)
    data.foreach(x => println(x))
    
    def sum(a: Int, b: Int, c: Int) = a + b + c
    println(sum(1, 2, 3))
    
    val fp_a = sum _ //实际上利用偏函数生成一个类Function3
    println(fp_a(1, 2, 3)) //实际调用新生成类的apply方法
    println(fp_a.apply(1, 2, 3))
    val fp_b = sum(1, _: Int, 3)
    println(fp_b(2))
    println(fp_b(10))
    
    data.foreach(println(_))
    data.foreach(println)
  }