list-runner/classes/SentinelDoubly.js

a lightweight linked-list implementation that offers both Singly (next) and Doubly data structures (next and previous)

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.SentinelDoubly = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));

var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));

var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));

var _SentinelSingly2 = require("./SentinelSingly");

var _constants = require("../constants");

var SentinelDoubly =
/*#__PURE__*/
function (_SentinelSingly) {
  (0, _inherits2["default"])(SentinelDoubly, _SentinelSingly);

  function SentinelDoubly() {
    var _this;

    var next = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
    var prev = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;
    var type = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : _constants.SENTINEL;
    (0, _classCallCheck2["default"])(this, SentinelDoubly);
    _this = (0, _possibleConstructorReturn2["default"])(this, (0, _getPrototypeOf2["default"])(SentinelDoubly).call(this, next, type));
    _this.prev = prev;
    return _this;
  }

  (0, _createClass2["default"])(SentinelDoubly, [{
    key: "getPrev",
    value: function getPrev() {
      return this.prev;
    }
  }, {
    key: "setPrev",
    value: function setPrev(cell) {
      this.prev = cell;
    }
  }]);
  return SentinelDoubly;
}(_SentinelSingly2.SentinelSingly); // eslint-disable-line import/prefer-default-export


exports.SentinelDoubly = SentinelDoubly;