Well it depends. If you want to make sure that everything is really send to the server, I'd recommend concatMap. ExhaustMap will ignore notifications between each inner Observable which might lead to a lose of informations. I hope that helps, if not don't hesitate to ask me
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re: About switchMap and friends VIEW POST
TOP OF THREAD FULL DISCUSSIONWell it depends. If you want to make sure that everything is really send to the server, I'd recommend
concatMap.ExhaustMapwill ignore notifications between each inner Observable which might lead to a lose of informations. I hope that helps, if not don't hesitate to ask me