...calculate Java hashCode?

Author: Patrik Forsberg
Homepage: http://www.woize.com

Category: Math

function hashCode(val: string): Integer;
var
  i: Integer;
  res: Extended;
  x: Integer;

  function RoundEx(x: Extended): Integer;
  begin
    Result := Trunc(x) + Trunc(Frac(x) * 2);
  end;
begin
  res := 0;

  for i := 1 to Length(val) do
  begin
    res := res + Ord(val[i]) * Power(31, Length(val) - (i - 1) - 1);
  end;

  Result := RoundEx(res);
end;

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