Scala函數式編程基礎

/**
  * 函數式編程
  */
object functionProgramming extends App{
    val a = List(3, 5, 8, 9, 2)
    a.foreach(println)
    a.foreach(println(_))
    println("___________________________")
    private val a_new: List[Int] = a.map(_+1)
    a_new.foreach(println)

    private val s1: List[Int] = a.sorted
    println(s1)

    val b = List("01 hadoop","02 spark","03 kudu","04 python")
    private val strings: List[String] = b.sortBy(_.split(" ")(1))
    println(strings)

    private val res1: List[Int] = a.sortWith((x, y) => if (x > y) true else false)
    println(res1.reverse)

    // 將函數作爲參數傳入方法中
    val f = (x: Int, y: Int) => x + y
    def m(x: Int, y: Int, f:(Int, Int) => Int)={
        val res = f(x, y)
        println("answer is: " + res)
    }

    m(8, 9, f)


}