public IItemList deleteItem(Item item) {
if (this.first.equals(item)) {
return rest.deleteItem(item);
} else {
return new PairItemList(this.first, rest.deleteItem(item));
}
}
// 1 4 | 2
//
public IItemList antiListe(IItemList items) {
if (items instanceof EmptyItemList) {
return this;
} else {
Item first = ((PairItemList) items).getFirst();
if (this.count(first) > 0) {
IItemList itemlist = this.deleteItem(first);
items = items.deleteItem(first);
return itemlist.antiListe(items);
// return this.antiListe(this.items.deleteItem(items.getFirst()));
} else {
return new PairItemList(this.first, this.rest.antiListe(items));
}
}
}