scala匿名函数

package com.ming.test
import scala.math._

object AnonymousFunc {

  def valueAtOneQuarter(f:(Double)=>Double)=f(0.25)

  def mulby(factor:Double)=(x:Double,y:Double)=>factor*x*y

  def main(args: Array[String]): Unit = {

    var a=Array(3.14,2,3).map { (x:Double) => 3*x }
    for(i<-a)println(i)
    var b=valueAtOneQuarter(ceil _)
    println(b)

    var c=mulby(4)
    var d=c(4,5)
    println(d)

     //高阶函数的使用，打印一个三角形
    (1 to 9).map("*" * _).foreach {println }

    (1 to 9).filter(_ % 2==0).foreach { println}

    //对字符串进行排序哦
    "mdasfsda,sdafdsaf,saf,哈哈发生大幅".split(",").sortWith(_.length>_.length).foreach { println }

    aa()

  }

  //控制抽象
  def until(condition: => Boolean)(block: =>Unit){
    if(!condition){
      block
      until(condition)(block)
    }
  }

  def aa()={
    var x=10
    until (x==0){
      x-=1
      println(x)
    }
  }

}