public static _listeners : Array [read-only]

A list of references to all listener objects registered with the Key object. This property is intended for internal use, but may be useful if you want to ascertain the number of listeners currently registered with the Key object. Objects are added and removed from this array by calls to the addListener() and removelistener() methods.

Example

The following example shows how to use the length property to ascertain the number of listener objects currently registered to the Key object.

    var myListener:Object = new Object();
    myListener.onKeyDown = function () {
    trace ("You pressed a key.");
    }
    Key.addListener(myListener);
    
    trace(Key._listeners.length); // Output: 1