@Override
public PList<Integer> extendAt(int i, PList<Integer> extra) {
if (extra instanceof IntList) {
IntList other = (IntList) extra;
ensureNMore((other.size() + i) - this.size());
System.arraycopy(other.box, 0, box, i, extra.size());
if (i + other.size > size) size = i + other.size;
} else {
for (Integer b : extra) {
this.set(i, b);
}
}
return null;
}
@Override
public PList<Integer> extend(PList<Integer> extra) {
if (extra instanceof IntList) {
IntList other = (IntList) extra;
ensureNMore(other.size());
System.arraycopy(other.box, 0, box, size, extra.size());
size += other.size;
} else {
for (Integer b : extra) {
this.add(b);
}
}
return null;
}