Rx.Observable.prototype.bufferWithTimeOrCount(timeSpan, count, [scheduler])

Projects each element of an observable sequence into a buffer that is completed when either it's full or a given amount of time has elapsed.
参数
timeSpan(Number): Maximum time length of a buffer.count(Number): Maximum element count of a buffer.[scheduler=Rx.Scheduler.timeout](Scheduler): Scheduler to run buffer timers on. If not specified, the timeout scheduler is used.
返回值
(Observable): An observable sequence of buffers.