bufferCount method

Observable<List<T>> bufferCount (int count, [ int startBufferEvery = 0 ])

Buffers a number of values from the source Observable by count then emits the buffer and clears it, and starts a new buffer each startBufferEvery values. If startBufferEvery is not provided, then new buffers are started immediately at the start of the source and when each buffer closes and is emitted.


count is the maximum size of the buffer emitted

Observable.range(1, 4)
  .listen(print); // prints [1, 2], [3, 4] done!


if startBufferEvery is 2, then a new buffer will be started on every other value from the source. A new buffer is started at the beginning of the source by default.

Observable.range(1, 5)
  .bufferCount(3, 2)
  .listen(print); // prints [1, 2, 3], [3, 4, 5], [5] done!


Observable<List<T>> bufferCount(int count, [int startBufferEvery = 0]) =>
    transform(BufferCountStreamTransformer<T>(count, startBufferEvery));