How to use 'asyncfor' to loop trough all the layers which name contains 'btn_'

Hello all,

I'm sure I've seen something like that before in another tour.
Even more, I think I've done it myself in the past! But I just can't find how to do it!

Basically I'd like to do is the following:

I have several <layers> which names are 'btn_#' (this is btn_1, btn_2, etc...)
Depends on the tour, sometimes there will be 2, 3, 4 buttons or more. Who knows.
I'd like to hide all the buttons at the same time, and this looks like a perfect job for 'asyncfor'

for(set(i,0), i LT 10, inc(i),
    	txtadd(btn_name,btn_,get(i),_icon);
    	tween(layer[get(btn_name)].alpha,0,.5,easeoutquad);
    	);

Yes that works but it feels like I'm cutting corners. You know, loop 10 times because I know I'll never put more than 10 of those buttons.

There must be a better way, where for example, the loop only applies to the layers which name contains 'btn_'
Is this possible?

Thanks

I juts found a way to do it by using the <layer> style attribute. Here it is:

for(set(i,0), i LT layer.count, inc(i),
   	      	copy(lr, layer[get(i)]);
   	  	    if(lr.style === color_btn_style,
 	    	         	txtadd(color_btn_name,color_btn_,get(i));
 	    	     	    tween(layer[get(color_btn_name)].alpha,0,.5,easeoutquad);
   	      	);
    	);

Sorry about the formatting. It never works right for me when I post code in the forum.