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- "use strict";
- var __extends = (this && this.__extends) || (function () {
- var extendStatics = function (d, b) {
- extendStatics = Object.setPrototypeOf ||
- ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
- function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
- return extendStatics(d, b);
- }
- return function (d, b) {
- extendStatics(d, b);
- function __() { this.constructor = d; }
- d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
- };
- })();
- Object.defineProperty(exports, "__esModule", { value: true });
- var Subscriber_1 = require("../Subscriber");
- function scan(accumulator, seed) {
- var hasSeed = false;
- if (arguments.length >= 2) {
- hasSeed = true;
- }
- return function scanOperatorFunction(source) {
- return source.lift(new ScanOperator(accumulator, seed, hasSeed));
- };
- }
- exports.scan = scan;
- var ScanOperator = (function () {
- function ScanOperator(accumulator, seed, hasSeed) {
- if (hasSeed === void 0) { hasSeed = false; }
- this.accumulator = accumulator;
- this.seed = seed;
- this.hasSeed = hasSeed;
- }
- ScanOperator.prototype.call = function (subscriber, source) {
- return source.subscribe(new ScanSubscriber(subscriber, this.accumulator, this.seed, this.hasSeed));
- };
- return ScanOperator;
- }());
- var ScanSubscriber = (function (_super) {
- __extends(ScanSubscriber, _super);
- function ScanSubscriber(destination, accumulator, _seed, hasSeed) {
- var _this = _super.call(this, destination) || this;
- _this.accumulator = accumulator;
- _this._seed = _seed;
- _this.hasSeed = hasSeed;
- _this.index = 0;
- return _this;
- }
- Object.defineProperty(ScanSubscriber.prototype, "seed", {
- get: function () {
- return this._seed;
- },
- set: function (value) {
- this.hasSeed = true;
- this._seed = value;
- },
- enumerable: true,
- configurable: true
- });
- ScanSubscriber.prototype._next = function (value) {
- if (!this.hasSeed) {
- this.seed = value;
- this.destination.next(value);
- }
- else {
- return this._tryNext(value);
- }
- };
- ScanSubscriber.prototype._tryNext = function (value) {
- var index = this.index++;
- var result;
- try {
- result = this.accumulator(this.seed, value, index);
- }
- catch (err) {
- this.destination.error(err);
- }
- this.seed = result;
- this.destination.next(result);
- };
- return ScanSubscriber;
- }(Subscriber_1.Subscriber));
- //# sourceMappingURL=scan.js.map
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