Created
February 11, 2020 13:02
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| fun <TSource> Observable<TSource>.pairWithPrevious() | |
| : Observable<Pair<TSource?, TSource?>> { | |
| return this | |
| .map { | |
| Pair(null as TSource?, it) | |
| } | |
| .scan { acc: Pair<TSource?, TSource?>, current: Pair<TSource?, TSource?> -> | |
| Pair(acc.second, current.second) | |
| } | |
| } |
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