IntArrayCards cards = array.cards ();
IntExpCardCardinalityObserver observer;
for (int i = min; i <= max; i++) {
if (_exp.contains (i)) {
card = cards.cardAt (i);
observer = new IntExpCardCardinalityObserver (card);
card.attachObserver (observer);
_cards.add (new IntExpAndObserver (card, observer));
}
}