Prototype is spamming my arrays!

Hi all, when I want to interate through an array, all those pesky Prototype 
functions get in my way!

When I do this:
---------------------

r="";
for(x in new Array()) {
r+="var: "+x+", val: "+ (new Array())[x]+"\n";
}
alert(r);


---------------------
I get a giant alert window with loads of functions printed out.
Is this a bug, or is there a better way to iterate over arrays?
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