ScalaのTest2

package com.example.java.Person2

import com.example.scala.person.Person
import com.sun.xml.internal.xsom.XSWildcard.Other

/**
 * Created by aram.park on 15/06/24.
 */

class Person(val name: String,
             val age: Int,
             val friends: List[String]=Nil) {
//Nil을 선언하는 이유는 뭔지 조사하기
  def introduce(): Unit = {
    printf("私の名前は%sです。年齢は%dです。\n", name, age)
  }
  def addFriend(friend: String):Person = {
    new Person(name,age,friends ::: friends)
  }
  def showFriends():Unit = {
    friends.foreach(println)
    //friends.foreach(friend ->println(friend)
    //
  }
  def showFrineds():Unit = {
    friends.filter(friend=>friend!="ハガー").foreach(println)
    //friends.filter(_!="ハガー")
  }
  def showFriendsWithSwimmy():Unit = {
    friends.filter(_!="ハガー").map(friend=>return "swimmy"+friend)
    //friends.filter(_!="ハガー").map(friend=>"swimmy"+friend).foreach(println)
    //
  }

}

object test2 {
  def main(args: Array[String]):Unit= {
    val aram = new Person("aram",22,List("ハガー","b","c"))
    val aram2 = new Person("newram",23,Nil)
  }
}