diff --git a/src/as/com/threerings/util/ArrayIterator.as b/src/as/com/threerings/util/ArrayIterator.as
new file mode 100644
index 000000000..2b7ca545c
--- /dev/null
+++ b/src/as/com/threerings/util/ArrayIterator.as
@@ -0,0 +1,81 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2009 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.util {
+
+import flash.errors.IllegalOperationError;
+
+/**
+ * Provides a generic iterator for an Array.
+ * No co-modification checking is done.
+ */
+public class ArrayIterator
+    implements Iterator
+{
+    /**
+     * Create an ArrayIterator.
+     */
+    public function ArrayIterator (arr :Array, allowRemove :Boolean = true)
+    {
+        _arr = arr;
+        _index = 0;
+        _lastIndex = allowRemove ? -1 : -2;
+    }
+
+    // documentation inherited from interface Iterator
+    public function hasNext () :Boolean
+    {
+        return (_index < _arr.length);
+    }
+
+    // documentation inherited from interface Iterator
+    public function next () :Object
+    {
+        if (_lastIndex != -2) {
+            _lastIndex = _index;
+        }
+        return _arr[_index++];
+    }
+
+    // documentation inherited from interface Iterator
+    public function remove () :void
+    {
+        if (_lastIndex < 0) {
+            throw new IllegalOperationError();
+
+        } else {
+            _arr.splice(_lastIndex, 1);
+            _lastIndex = -1;
+            _index--; // since _lastIndex is always before _index
+        }
+    }
+
+    /** The array we're iterating over. */
+    protected var _arr :Array;
+
+    /** The current index. */
+    protected var _index :int;
+
+    /** The last-removed index.
+     * Or -1 for already removed, -2 for no removals allowed. */
+    protected var _lastIndex :int;
+}
+}
diff --git a/src/as/com/threerings/util/Iterator.as b/src/as/com/threerings/util/Iterator.as
new file mode 100644
index 000000000..1d4235db1
--- /dev/null
+++ b/src/as/com/threerings/util/Iterator.as
@@ -0,0 +1,46 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2009 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.util {
+
+/**
+ * An Iterator interface for ActionScript.
+ * Flex defines IViewCursor, but it defines 14 methods and 5 read-only properties, which
+ * is a large implementation burden. This provides a simpler alternative.
+ */
+public interface Iterator
+{
+    /**
+     * Is there another element available?
+     */
+    function hasNext () :Boolean;
+
+    /**
+     * Returns the next element.
+     */
+    function next () :Object;
+
+    /**
+     * Remove the last returned element.
+     */
+    function remove () :void;
+}
+}