static <A> L<A> listFromFunction(int n, IF1<Int, A> f) {
  ret new RandomAccessAbstractList<A>() {
    public int size() { ret n; }
    public A get(int i) { ret f.get(i); }
  };
}

static <A> L<A> lambdaMapLike listFromFunction(IF1<Int, A> f, int n) {
  ret listFromFunction(n, f);
}