int List::deleteLast() {
if (currentSize != 0) {
int tmp = last->getContent();
ListItem *del = last;
last = del->getPrevious();
delete del;
currentSize--;
return tmp;
}
else
return 0;
}
void List::insertElementAt(int i, int pos) {
if (pos <= 0)
prependElement(i);
else if (pos >= getSize())
appendElement(i);
else {
ListItem *tmp = first;
while (pos-- > 0) {
tmp = tmp->getNext();
}
new ListItem(tmp->getPrevious(), tmp, i);
currentSize++;
}
}
void List::insertElementAt(int i, int pos) {
if (pos <= 0) {
prependElement(i);
}
else if (pos >= getSize()) {
appendElement(i);
}
else {
ListItem* p = first;
// iterate over elements
while (pos-- > 0) {
p = p->getNext();
}
new ListItem(p->getPrevious(), p, i);
++currentSize;
}
}