@quantlab/handsontable
Version:
Spreadsheet-like data grid editor that provides copy/paste functionality compatible with Excel/Google Docs
94 lines (74 loc) • 2.24 kB
JavaScript
;
exports.__esModule = true;
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
/**
* @class Queue
* @util
*/
var Queue = function () {
function Queue() {
var initial = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
_classCallCheck(this, Queue);
/**
* Items collection.
*
* @type {Array}
*/
this.items = initial;
}
/**
* Add new item or items at the back of the queue.
*
* @param {*} items An item to add.
*/
_createClass(Queue, [{
key: "enqueue",
value: function enqueue() {
var _items;
(_items = this.items).push.apply(_items, arguments);
}
/**
* Remove the first element from the queue and returns it.
*
* @returns {*}
*/
}, {
key: "dequeue",
value: function dequeue() {
return this.items.shift();
}
/**
* Return the first element from the queue (without modification queue stack).
*
* @returns {*}
*/
}, {
key: "peek",
value: function peek() {
return this.isEmpty() ? void 0 : this.items[0];
}
/**
* Check if the queue is empty.
*
* @returns {Boolean}
*/
}, {
key: "isEmpty",
value: function isEmpty() {
return !this.size();
}
/**
* Return number of elements in the queue.
*
* @returns {Number}
*/
}, {
key: "size",
value: function size() {
return this.items.length;
}
}]);
return Queue;
}();
exports.default = Queue;