ScalaCollectionsSignature.scala

import scala.collection.immutable.{HashMap, ListMap, ListSet, Queue}
import scala.collection.{LinearSeq, SortedSet, mutable}

val trav = Traversable(1, 2, 3)
val iter = Iterable("x", "y", "z")
val map = Map("x" -> 24, "y" -> 25, "z" -> 26)

val numArray = Array[Int](1, 2, 3, 4, 5)

val numList = List[Int](1, 2, 3, 4, 5)
val vector: Vector[Int] = Vector(1,2,3)

val set = Set("color",1,1)                           //Set(color, 1)
val sortedSet = SortedSet("hello", "world") //TreeSet(hello, world)
val buffer = mutable.Buffer(1, 2, 'z')    //ArrayBuffer(1, 2, 122)
val indexedSeq = IndexedSeq(1.0, 2.0)     //Vector(1.0, 2.0)
val linearSeq= LinearSeq('a', 'b', 'c')

//Maps
var hashMapName = HashMap("key1"->"value1", "key2"->"value2", "key3"->"value3")
var listMap = ListMap("Rice"->"100","Wheat"->"50","Gram"->"500")

val listSet = ListSet(1, 2, 3, 4)
val aTuple = (2, "hello, Scala")
var queue = Queue(200,5,6,2,3,9,5,2,5)

var stream2 = (1 to 10).toStream //Stream(1, ?)
var stream = 100 #:: 200 #:: 85 #:: Stream.empty //Stream(100, ?)
var firstElement = stream2.head   //  1

//Option
val myFirstOption: Option[Int] = Some(4)  //Some(4)