public ListValue<T> concatFront(T other) {
ListValue<T> list = new ListValue<T>();
list.add(other);
Iterator<T> iter = this.m_list.iterator();
while (iter.hasNext()) list.add(iter.next());
return list;
}
public ListValue<T> slice(NumValue a, NumValue b) {
int i = c_index(a);
int j = c_index(b);
ListValue<T> list = new ListValue<T>();
for (int k = i; k < j; k++) {
list.add(m_list.get(k));
}
return list;
}