@reactivex/rxjs

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class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { Subscriber } from '../Subscriber'; /* tslint:disable:max-line-length */ export function reduce(accumulator, seed) { var hasSeed = false; // providing a seed of `undefined` *should* be valid and trigger // hasSeed! so don't use `seed !== undefined` checks! // For this reason, we have to check it here at the original call site // otherwise inside Operator/Subscriber we won't know if `undefined` // means they didn't provide anything or if they literally provided `undefined` if (arguments.length >= 2) { hasSeed = true; } return this.lift(new ReduceOperator(accumulator, seed, hasSeed)); } export var ReduceOperator = (function () { function ReduceOperator(accumulator, seed, hasSeed) { if (hasSeed === void 0) { hasSeed = false; } this.accumulator = accumulator; this.seed = seed; this.hasSeed = hasSeed; } ReduceOperator.prototype.call = function (subscriber, source) { return source._subscribe(new ReduceSubscriber(subscriber, this.accumulator, this.seed, this.hasSeed)); }; return ReduceOperator; }()); /** * We need this JSDoc comment for affecting ESDoc. * @ignore * @extends {Ignored} */ export var ReduceSubscriber = (function (_super) { __extends(ReduceSubscriber, _super); function ReduceSubscriber(destination, accumulator, seed, hasSeed) { _super.call(this, destination); this.accumulator = accumulator; this.hasSeed = hasSeed; this.hasValue = false; this.acc = seed; } ReduceSubscriber.prototype._next = function (value) { if (this.hasValue || (this.hasValue = this.hasSeed)) { this._tryReduce(value); } else { this.acc = value; this.hasValue = true; } }; ReduceSubscriber.prototype._tryReduce = function (value) { var result; try { result = this.accumulator(this.acc, value); } catch (err) { this.destination.error(err); return; } this.acc = result; }; ReduceSubscriber.prototype._complete = function () { if (this.hasValue || this.hasSeed) { this.destination.next(this.acc); } this.destination.complete(); }; return ReduceSubscriber; }(Subscriber)); //# sourceMappingURL=reduce.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>