50 lines
1.8 KiB
JavaScript
50 lines
1.8 KiB
JavaScript
"use strict";
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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; }; }();
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function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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// Set that counts
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module.exports = function () {
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function CountedSet() {
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_classCallCheck(this, CountedSet);
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// because you can't simply extend Builtins yet
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this.map = new Map();
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}
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_createClass(CountedSet, [{
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key: "keys",
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value: function keys() {
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return [].concat(_toConsumableArray(this.map.keys()));
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}
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}, {
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key: "has",
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value: function has(value) {
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return this.map.has(value);
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}
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}, {
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key: "add",
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value: function add(value) {
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if (!this.has(value)) {
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this.map.set(value, 0);
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}
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this.map.set(value, this.map.get(value) + 1);
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}
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}, {
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key: "delete",
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value: function _delete(value) {
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if (!this.has(value)) return;
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var count = this.map.get(value);
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if (count <= 1) {
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this.map.delete(value);
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} else {
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this.map.set(value, count - 1);
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}
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}
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}]);
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return CountedSet;
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}(); |