///
module Rx {
export interface Observable {
/**
* 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, seed?: TAcc): Observable;
/**
* 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, seed?: T): Observable;
}
}
(function() {
var o: Rx.Observable;
o = o.reduce((a, x) => a * x);
o = o.reduce((a, x) => a * x, 1);
});