scala collections

scalaCollections.scala

import java.util
import scala.::
import scala.collection.mutable
import scala.collection.mutable.ListBuffer

object Collections {

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

    val nameList: Array[String] = new Array[String](3)

    val ageList = Array(5,3,8,7,1,9,23)

    nameList(0) = "biilisim.io"
    nameList(1) = "cem"
    nameList(2) = "nehir"

    for (i <- 0 until  nameList.length){
      println(nameList(i))
    }

    ageList.map(age => println(age))

    ageList.update(0,13) //replace
    val minNumber = ageList.min
    val maxNumber = ageList.max
    val head = ageList.head
    val last = ageList.last
    println(minNumber + " - " + maxNumber + " - " + head + " - " + last) // 1 - 23 - 13 - 23

    val newAgeList: Array[Int] = ageList.drop(3) // listenin başından 3 elaman siler
    newAgeList.map(age => println(age))

    println("---")

    val numbers = (1 to 10).toArray // until de kullanılabilir.
    numbers.map(number => println(number))

    println("--Collections--")

    val cities: List[String] = List("İstanbul","Sinop","Bursa","Konya")
    cities.foreach(city => println(city))

    var list: ListBuffer[Int] = ListBuffer()
    list += 4
    list += 7

    var fruits = new ListBuffer[String]()
    fruits += "mandalina"
    fruits += "portakal"
    fruits.foreach(fruit => println(fruit))

    val list1: List[String] = Nil

    val istanbul = cities.head
    var tailCity = cities.tail
    val isEmpty: Boolean = cities.isEmpty

    val citySet: Set[String] = Set("İzmir","Muğla","Erzurum")
    //citySet += "Van" // compiler error. Çünkü immutable

    var superLig: Set[String] = Set()
    superLig += "fenerbahçe"
    superLig += "galatasaray"
    superLig += "beşiktaş"
    superLig += "trabzonspor"

    var ptt: Set[String] = Set("ankaragücü")
    ptt += "ordu spor"
    ptt += "giresun spor"
    ptt += "giresun spor"

    val allTeams: Set[String] = superLig ++ ptt

    allTeams.foreach(team => println(team))

    println("--MAP--")

    val immutableMap = Map(1 -> "cem", 2 -> "emir")
    //immutableMap += 3 -> "necip" // compiler error
    val mutableMap = collection.mutable.Map(1 -> "serra", 2 -> "nehir")
    mutableMap += 3 -> "necip"
    mutableMap += 4 -> "enes"

    var isMapEmpty: Boolean = immutableMap.isEmpty
    var value: Option[String] = immutableMap.get(1)
    if (value.nonEmpty){
      println(value.get)
      println("map size:" + immutableMap.size)
    }

    mutableMap.foreach(key => println("key: " + key._1 + ", value: " + key._2))

    mutableMap.remove(4)

    mutableMap.foreach(key => println("key: " + key._1 + ", value: " + key._2))


    println("--TUPLES--")

    val friendTuple = ("Haluk", 28,"ios developer",8.8, true)
    val (name, age, job,score, isPlayer) = ("Ömer", 27,"java developer",9.8, false)
    val (name1, age1, job1, score1, isPlayer1) = ("Halil", 27,"android developer",14.8, false)

    println(friendTuple._1 + " - " + friendTuple._2)
    println(name + " - " + score + " - " + job)


  }

}