in reply to undef and "x" operator

Just for the fun of it:
$_="0*1*2*3*4*5*6*7*8"; eval '(' . 'undef,' x 5 . '$hic)=split/\*/'; print $hic;

s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e