@reactivex/rxjs

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <base data-ice="baseUrl" href="../../../"> <title data-ice="title">es6/operator/windowCount.js | RxJS API Document</title> <link type="text/css" rel="stylesheet" href="css/style.css"> <link type="text/css" rel="stylesheet" href="css/prettify-tomorrow.css"> <script src="script/prettify/prettify.js"></script> <script src="script/manual.js"></script> <script data-ice="userScript" src="user/script/0-Rx.js"></script> <script data-ice="userScript" src="user/script/1-devtools-welcome.js"></script> <script data-ice="userScript" src="user/script/2-custom-manual-styles.js"></script> <script data-ice="userScript" src="user/script/3-decision-tree-widget.min.js"></script> <script data-ice="userScript" src="user/script/4-theme-toggler.js"></script> <link data-ice="userStyle" rel="stylesheet" href="user/css/0-main.css"> </head> <body class="layout-container" data-ice="rootContainer"> <header> <a href="./">Home</a> <a href="./manual/index.html" data-ice="manualHeaderLink">Manual</a> <a href="identifiers.html">Reference</a> <a href="source.html">Source</a> <a href="test.html" data-ice="testLink">Test</a> <a data-ice="repoURL" href="https://github.com/ReactiveX/RxJS" class="repo-url-github">Repository</a> <div class="search-box"> <span> <img src="./image/search.png"> <span class="search-input-edge"></span><input class="search-input"><span class="search-input-edge"></span> </span> <ul class="search-result"></ul> </div> </header> <nav class="navigation" data-ice="nav"><div> <ul> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AsyncSubject">AsyncSubject</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-BehaviorSubject">BehaviorSubject</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Notification">Notification</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Observable">Observable</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ReplaySubject">ReplaySubject</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Scheduler">Scheduler</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AnonymousSubject">AnonymousSubject</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subject">Subject</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-SubjectSubscriber">SubjectSubscriber</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subscriber">Subscriber</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Subscription">Subscription</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-Rx.Scheduler">Rx.Scheduler</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-typedef">T</span><span data-ice="name"><span><a href="typedef/index.html#static-typedef-Rx.Symbol">Rx.Symbol</a></span></span></li> <li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">observable</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ConnectableObservable">ConnectableObservable</a></span></span></li> <li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">observable/dom</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxError">AjaxError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxResponse">AjaxResponse</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-AjaxTimeoutError">AjaxTimeoutError</a></span></span></li> <li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">operator</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-GroupedObservable">GroupedObservable</a></span></span></li> <li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">scheduler</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-Action">Action</a></span></span></li> <li data-ice="doc"><div data-ice="dirPath" class="nav-dir-path">util</div><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ArgumentOutOfRangeError">ArgumentOutOfRangeError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-EmptyError">EmptyError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-ObjectUnsubscribedError">ObjectUnsubscribedError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-TimeoutError">TimeoutError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-UnsubscriptionError">UnsubscriptionError</a></span></span></li> <li data-ice="doc"><span data-ice="kind" class="kind-variable">V</span><span data-ice="name"><span><a href="variable/index.html#static-variable-root">root</a></span></span></li> </ul> </div> </nav> <div class="content" data-ice="content"><h1 data-ice="title">es6/operator/windowCount.js</h1> <pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { Subscriber } from '../Subscriber'; import { Subject } from '../Subject'; /** * Branch out the source Observable values as a nested Observable with each * nested Observable emitting at most `windowSize` values. * * <span class="informal">It's like {@link bufferCount}, but emits a nested * Observable instead of an array.</span> * * <img src="./img/windowCount.png" width="100%"> * * Returns an Observable that emits windows of items it collects from the source * Observable. The output Observable emits windows every `startWindowEvery` * items, each containing no more than `windowSize` items. When the source * Observable completes or encounters an error, the output Observable emits * the current window and propagates the notification from the source * Observable. If `startWindowEvery` is not provided, then new windows are * started immediately at the start of the source and when each window completes * with size `windowSize`. * * @example <caption>Ignore every 3rd click event, starting from the first one</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var result = clicks.windowCount(3) * .map(win => win.skip(1)) // skip first of every 3 clicks * .mergeAll(); // flatten the Observable-of-Observables * result.subscribe(x => console.log(x)); * * @example <caption>Ignore every 3rd click event, starting from the third one</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var result = clicks.windowCount(2, 3) * .mergeAll(); // flatten the Observable-of-Observables * result.subscribe(x => console.log(x)); * * @see {@link window} * @see {@link windowTime} * @see {@link windowToggle} * @see {@link windowWhen} * @see {@link bufferCount} * * @param {number} windowSize The maximum number of values emitted by each * window. * @param {number} [startWindowEvery] Interval at which to start a new window. * For example if `startWindowEvery` is `2`, then a new window will be started * on every other value from the source. A new window is started at the * beginning of the source by default. * @return {Observable<Observable<T>>} An Observable of windows, which in turn * are Observable of values. * @method windowCount * @owner Observable */ export function windowCount(windowSize, startWindowEvery) { if (startWindowEvery === void 0) { startWindowEvery = 0; } return this.lift(new WindowCountOperator(windowSize, startWindowEvery)); } var WindowCountOperator = (function () { function WindowCountOperator(windowSize, startWindowEvery) { this.windowSize = windowSize; this.startWindowEvery = startWindowEvery; } WindowCountOperator.prototype.call = function (subscriber, source) { return source._subscribe(new WindowCountSubscriber(subscriber, this.windowSize, this.startWindowEvery)); }; return WindowCountOperator; }()); /** * We need this JSDoc comment for affecting ESDoc. * @ignore * @extends {Ignored} */ var WindowCountSubscriber = (function (_super) { __extends(WindowCountSubscriber, _super); function WindowCountSubscriber(destination, windowSize, startWindowEvery) { _super.call(this, destination); this.destination = destination; this.windowSize = windowSize; this.startWindowEvery = startWindowEvery; this.windows = [new Subject()]; this.count = 0; destination.next(this.windows[0]); } WindowCountSubscriber.prototype._next = function (value) { var startWindowEvery = (this.startWindowEvery > 0) ? this.startWindowEvery : this.windowSize; var destination = this.destination; var windowSize = this.windowSize; var windows = this.windows; var len = windows.length; for (var i = 0; i < len && !this.closed; i++) { windows[i].next(value); } var c = this.count - windowSize + 1; if (c >= 0 && c % startWindowEvery === 0 && !this.closed) { windows.shift().complete(); } if (++this.count % startWindowEvery === 0 && !this.closed) { var window_1 = new Subject(); windows.push(window_1); destination.next(window_1); } }; WindowCountSubscriber.prototype._error = function (err) { var windows = this.windows; if (windows) { while (windows.length > 0 && !this.closed) { windows.shift().error(err); } } this.destination.error(err); }; WindowCountSubscriber.prototype._complete = function () { var windows = this.windows; if (windows) { while (windows.length > 0 && !this.closed) { windows.shift().complete(); } } this.destination.complete(); }; WindowCountSubscriber.prototype._unsubscribe = function () { this.count = 0; this.windows = null; }; return WindowCountSubscriber; }(Subscriber)); //# sourceMappingURL=windowCount.js.map</code></pre> </div> <footer class="footer"> Generated by <a href="https://esdoc.org">ESDoc<span data-ice="esdocVersion">(0.4.8)</span></a> </footer> <script src="script/search_index.js"></script> <script src="script/search.js"></script> <script src="script/pretty-print.js"></script> <script src="script/inherited-summary.js"></script> <script src="script/test-summary.js"></script> <script src="script/inner-link.js"></script> <script src="script/patch-for-local.js"></script> </body> </html>