--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/selection-map.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,5 @@
+d3_selectionPrototype.map = function(map) {
+  return this.each(function() {
+    this.__data__ = map.apply(this, arguments);
+  });
+};