September 2017 Update

Task/Symmetric-difference/Kotlin/symmetric-difference.kotlin

@@ -0,0 +1,14 @@
+// version 1.1.2
+
+fun main(args: Array<String>) {
+    val a = setOf("John", "Bob", "Mary", "Serena")
+    val b = setOf("Jim", "Mary", "John", "Bob")
+    println("A     = $a")
+    println("B     = $b")
+    val c =  a - b
+    println("A \\ B = $c")
+    val d = b - a
+    println("B \\ A = $d")
+    val e = c.union(d)
+    println("A Δ B = $e")
+}