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  1. or download this
    do { local @_;
         alias $_[0] = ++$x;          # Aliases to $x
         alias $_[1] = $array[++$x];
         $_[1] = $_[0]
       };
    
  2. or download this
    do { our $arg0; local *arg0 = \( ++$x         );
         our $arg1; local *arg1 = \( $array[++$x] );
         $arg1 = $arg0;
       }