[OpenLayers-Users] Augmenting a method?

[Piero Campa]

Hi all,
I've been reading about different ways on how to override an existing
method.
That are, e.g.:

* OpenLayer.Control.myControl = OpenLayers.Class.create();
* OpenLayers.Control.myControl.prototype = OpenLayers.Class.inherit(
OpenLayers.Control.Navigation, {
*
*     defaultDblClick: function (evt) {
*         // ...my defaultDblClick overridden code...
*     },
*
*     CLASS_NAME: "OpenLayers.Control.myNavigation"
* });

Or simply:

* OpenLayers.Control.myControl =
OpenLayers.Class(OpenLayers.Control.Navigation, {
*
*     defaultDblClick: function (evt) {
*         // ...my defaultDblClick overridden code...
*     }})

Is there any difference between these methods?
I would really appreciate an explanation, thank you so much.
Piero
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