Add all the A tasks

Task/Apply-a-callback-to-an-array/ActionScript/apply-a-callback-to-an-array.as

@@ -0,0 +1,19 @@
+package
+{
+    public class ArrayCallback
+    {
+        public function main():void
+        {
+            var nums:Array = new Array(1, 2, 3);
+            nums.map(function(n:Number, index:int, arr:Array):void { trace(n * n * n); });
+
+            // You can also pass a function reference
+            nums.map(cube);
+        }
+
+        private function cube(n:Number, index:int, arr:Array):void
+        {
+            trace(n * n * n);
+        }
+    }
+}