How to use

heapify

method

in

smile.sort.HeapSelect

/**
 * Assimilate a new value from the stream.
 */
public void add(T datum) {
  sorted = false;
  if (n < k) {
    heap[n++] = datum;
    if (n == k) {
      heapify(heap);
    }
  } else {
    n++;
    if (datum.compareTo(heap[0]) < 0) {
      heap[0] = datum;
      SortUtils.siftDown(heap, 0, k-1);
    }
  }
}

datum.key = data[i];
datum.value = data[i];
heap.heapify();

datum.key = keys[index[idx]];
datum.value = data[index[idx]];
heap.heapify();