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flatmap vs concatmap

Deepika Sahu answered on December 29, 2022 Popularity 6/10 Helpfulness 3/10

answer flatmap vs concatmap

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flatmap vs concatmap

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Flat map uses merge operator while concatMap uses concat operator.

As you see the concatMap output sequence is ordered - all of the items emitted by the first Observable being emitted before any of the items emitted by the second Observable,
while flatMap output sequence is merged - the items emitted by the merged Observable may appear in any order, regardless of which source Observable they came from.

Popularity 6/10 Helpfulness 3/10 Language whatever

Source: Grepper

Tags: concatmap flatmap whatever

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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flatmap vs concatmap

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@Test
public void flatMapVsConcatMap() throws Exception {
    System.out.println("******** Using flatMap() *********");
    Observable.range(1, 15)
            .flatMap(item -> Observable.just(item).delay(1, TimeUnit.MILLISECONDS))
            .subscribe(x -> System.out.print(x + " "));

    Thread.sleep(100);

    System.out.println("\n******** Using concatMap() *********");
    Observable.range(1, 15)
            .concatMap(item -> Observable.just(item).delay(1, TimeUnit.MILLISECONDS))
            .subscribe(x -> System.out.print(x + " "));

    Thread.sleep(100);
}

Popularity 6/10 Helpfulness 1/10 Language java

Source: stackoverflow.com

Tags: java concatmap flatmap conc

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

flatmap vs concatmap

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