d2-ui
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text/typescript
/// <reference path="../../observable.ts"/>
module Rx {
export interface Observable<T> {
/**
* Applies an accumulator function over an observable sequence, returning the result of the aggregation as a single element in the result sequence. The specified seed value is used as the initial accumulator value.
* For aggregation behavior with incremental intermediate results, see Observable.scan.
* @param {Function} accumulator An accumulator function to be invoked on each element.
* @param {Any} [seed] The initial accumulator value.
* @returns {Observable} An observable sequence containing a single element with the final accumulator value.
*/
reduce<TAcc>(accumulator: _Accumulator<T, TAcc>, seed?: TAcc): Observable<TAcc>;
/**
* Applies an accumulator function over an observable sequence, returning the result of the aggregation as a single element in the result sequence. The specified seed value is used as the initial accumulator value.
* For aggregation behavior with incremental intermediate results, see Observable.scan.
* @param {Function} accumulator An accumulator function to be invoked on each element.
* @param {Any} [seed] The initial accumulator value.
* @returns {Observable} An observable sequence containing a single element with the final accumulator value.
*/
reduce(accumulator: _Accumulator<T, T>, seed?: T): Observable<T>;
}
}
(function() {
var o: Rx.Observable<number>;
o = o.reduce<number>((a, x) => a * x);
o = o.reduce((a, x) => a * x, 1);
});