```Observable.just("Alpha", "Beta", "Gamma", "Delt...

# rx

[ivano]

Observable.just("Alpha", "Beta", "Gamma", "Delta", "Epsilon")
                .collect(Callable<HashSet<Any>> { HashSet() }, BiConsumer<HashSet<Any>, String> { obj, e -> obj.add(e) })
                .subscribe { s -> println("Received: $s") }