system.reactive - group and aggregate with rxjs -

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scan works this(with sum function):

1-1-1-1-1-1 -> 1-2-3-4-5-6

but need this: n=3

1-1-1-1-1-1 -> 3-3

how achieve behavior?

in rxjs can use bufferwithcount:

var source = rx.observable.from([1,1,1,1,1,1])                   .bufferwithcount(3)                   .flatmap(group => rx.observable.from(group).sum());

you optionally use windowwithcount don't have rewrap output in order use sum you'll empty final window well, fire out extraneous 0 value.


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