�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` class Node { /// value; /// next; constructor(value) { this.value = value; // TODO: Remove this when targeting Node.js 12. this.next = undefined; } } class Queue { // TODO: Use private class fields when targeting Node.js 12. // #_head; // #_tail; // #_size; constructor() { this.clear(); } enqueue(value) { const node = new Node(value); if (this._head) { this._tail.next = node; this._tail = node; } else { this._head = node; this._tail = node; } this._size++; } dequeue() { const current = this._head; if (!current) { return; } this._head = this._head.next; this._size--; return current.value; } clear() { this._head = undefined; this._tail = undefined; this._size = 0; } get size() { return this._size; } * [Symbol.iterator]() { let current = this._head; while (current) { yield current.value; current = current.next; } } } module.exports = Queue;