How to check for a null object?

[chronozphere]

var
  Arr: array [0..5] of TObject;
begin
  //Stuff here....

  for i:=0 to high(Arr) do
    if Arr[i] = nil then
      ShowMessage( Format('Position %d is NIL.', [i]) );
end;

(lol, thumbsdown icon was accidental.. srry. )