```arrayListOf(11,2,5,8,10,13,9,7,3,4).toObservabl...
# rxm
mingkangpan
04/12/2017, 9:10 PM Copy code
arrayListOf(11,2,5,8,10,13,9,7,3,4).toObservable()
.groupBy { i -> i % 2 == 0 }
.flatMap { g -> g.reduce { t1,t2 -> t1 + t2 } }mingkangpan
04/12/2017, 9:10 PMarrayListOf(11,2,5,8,10,13,9,7,3,4).toObservable()
.groupBy { i -> i % 2 == 0 }
.flatMap { g -> g.reduce { t1,t2 -> t1 + t2 } }