rm for ... in

input/devices.cm

@@ -52,16 +52,14 @@ function gamepad_type(device_id) {
 
 // List all registered devices
 function list() {
-  return Object.keys(_devices)
+  return array(_devices)
 }
 
 // List devices of a specific kind
 function list_by_kind(kind) {
-  var result = []
-  for (var id in _devices) {
-    if (_devices[id].kind == kind) result.push(id)
-  }
-  return result
+  return filter(array(_devices), function(id) {
+    return _devices[id].kind == kind
+  })
 }
 
 return {