diff --git a/source/Ox/js/Collection.js b/source/Ox/js/Collection.js
index e8943035..ee57eb0a 100644
--- a/source/Ox/js/Collection.js
+++ b/source/Ox/js/Collection.js
@@ -523,6 +523,26 @@ Ox.sum = function(collection) {
     return ret;
 };
 
+/* FIXME: do we need this kind of zip functionality?
+
+Ox.arrayToObject = function(array, key) {
+    var ret = {};
+    array.forEach(function(v) {
+        ret[v[key]] = v;
+    });
+    return ret;
+};
+
+Ox.objectToArray = function(object, key) {
+    var ret = [];
+    Ox.forEach(object, function(v, k) {
+        ret.push(Ox.extend(v, key, k));
+    });
+    return ret
+};
+
+*/
+
 /*@
 Ox.values <f> Returns the values of a collection
     > Ox.values([1, 2, 3])