hash key 'file' represents files. folders do not have this key. that's why: 
                if ($$a{'file'} && !$$b{'file'}) {
                        return 1;
                } elsif (!$$a{'file'} && $$b{'file'}) {
                        return -1;
                }

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In reply to Re^2: sorting tree with folders on top by diweooy
in thread sorting tree with folders on top by diweooy

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