Function pop

packages/scheduler/src/SchedulerMinHeap.js:27–40

(heap: Heap<T>)

}

export function pop<T: Node>(heap: Heap<T>): T | null {
  if (heap.length === 0) {
    return null;
  }
  const first = heap[0];
  const last = heap.pop();
  if (last !== first) {
    // $FlowFixMe[incompatible-type]
    heap[0] = last;
    // $FlowFixMe[incompatible-call]
    siftDown(heap, last, 0);
  }
  return first;
}

function siftUp<T: Node>(heap: Heap<T>, node: T, i: number): void {
  let index = i;