use Ox.contains

source/Ox/js/Function.js

@@ -65,7 +65,6 @@ Ox.identity = function(val) {
 Ox.noop <f> Returns undefined and calls optional callback without arguments
     This can be used to combine a synchronous and an asynchronous code path.
 @*/
-// IE 8 doesn't like `Ox.void`
 Ox.noop = function(callback) {
     Ox.isFunction(callback) && callback();
 };

source/Ox/js/Type.js

@@ -7,7 +7,7 @@ Ox.checkType <f> Throws a TypeError if a value is not of a given type
     type <s|[s]> Type, or array of types
 @*/
 Ox.checkType = function(val, type) {
-    if (!Ox.in(Ox.makeArray(type), Ox.typeOf(val))) {
+    if (!Ox.contains(Ox.makeArray(type), Ox.typeOf(val))) {
         throw new TypeError();
     }
 };