Data commit

Task/Collections/Kotlin/collections.kotlin

@@ -0,0 +1,43 @@
+import java.util.PriorityQueue
+
+fun main(args: Array<String>) {
+    // generic array
+    val ga = arrayOf(1, 2, 3)
+    println(ga.joinToString(prefix = "[", postfix = "]"))
+
+    // specialized array (one for each primitive type)
+    val da = doubleArrayOf(4.0, 5.0, 6.0)
+    println(da.joinToString(prefix = "[", postfix = "]"))
+
+    // immutable list
+    val li = listOf<Byte>(7, 8, 9)
+    println(li)
+
+    // mutable list
+    val ml = mutableListOf<Short>()
+    ml.add(10); ml.add(11); ml.add(12)
+    println(ml)
+
+    // immutable map
+    val hm = mapOf('a' to 97, 'b' to 98, 'c' to 99)
+    println(hm)
+
+    // mutable map
+    val mm = mutableMapOf<Char, Int>()
+    mm.put('d', 100); mm.put('e', 101); mm.put('f', 102)
+    println(mm)
+
+    // immutable set (duplicates not allowed)
+    val se = setOf(1, 2, 3)
+    println(se)
+
+    // mutable set (duplicates not allowed)
+    val ms = mutableSetOf<Long>()
+    ms.add(4L); ms.add(5L); ms.add(6L)
+    println(ms)
+
+    // priority queue (imported from Java)
+    val pq = PriorityQueue<String>()
+    pq.add("First"); pq.add("Second"); pq.add("Third")
+    println(pq)
+}