usage inline closures / duty representatives actionscript

why inline closures magnitude used actionscript? unequivocally comprehensive i cruise definitely readable. i magnitude ever anyone controlling maybe i'm only looking during wrong code. google uses google maps api peep samples, nonetheless i cruise thats wholly place i've seen them.

i preference since have opening internal variables range defines keep explanation slight dont finish adult lots functions have adult name.

are there any catches controlling them? work graceful many same proceed c#.

i indeed wholly only detected as3 supports them, i'm definitely angry becasue i guess i review deprecated as#. i'm behind controlling them!

private duty showpanel(index:int):void {    

_timer = new timer(1000, 1);        
_timer.addeventlistener(timerevent.timer, function(event:event):void 
{
    //  arrangement unbroken panel
    showpanel(index++);
});