Map Set

fun main(args: Array<String>) { 
    val items = listOf(1, 2, 3, 4) 
    println("First Element of our list----"+items.first()) 
    println("First Element of our list----"+items.last()) 
    println("Even Numbers of our List----"+items.filter { it % 2 == 0 })   // returns [2, 4] 
    val readWriteMap = hashMapOf("foo" to 1, "bar" to 2) 
    println(readWriteMap["foo"])  // prints "1" 
    val strings = hashSetOf("a", "b", "c", "c") 
    println("My Set Values are"+strings) 
}