sub invert {
  return @_ unless @_>1;
  ($_[0],$_[-1]) = ($_[-1],$_[0]);
  invert(@_[1..$#_-1]);
}

@l = (10..20);
print "@l becomes ";
invert @l;
print "@l\n";

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In reply to Re: interchanging variables the tough way by gnat
in thread interchanging variables the tough way by ANKUR

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