the way i'd think of doing it would be to have streams be c…

the way i'd think of doing it would be to have streams be composable, so you can put two streams together & it results in a stream, or take a stream & filter it to get another stream, take that filtered stream & combine it w/ the stream w/ two things in it & you get a stream of three things but one of them is filtered first, & then you can keep layering & combining things