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concat() and concatWith()

Anjali Sharma answered on January 6, 2023 Popularity 9/10 Helpfulness 1/10

answer concat() and concatWith()

concat() and concatWith()

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Java requires that all code be part of a class, so you can't just have Flux concat(Flux, Flux) as a free function, which imo would be the least confusing.

Some people prefer "always member functions" others prefer "static functions when taking two (or more) of same class".

A third alternative would be a constructor of the form Flux::Flux(Flux, Flux) (or Flux::Flux(Flux[]))

Combine 2 reactive streams into one

 Flux<String> namesFlux_transform_concatwith(int stringLength) {
        Function<Flux<String>, Flux<String>> filterMap = name -> name.map(String::toUpperCase)
                .filter(s -> s.length() > stringLength)
                .map(s -> s.length() + "-" + s);

        var namesList = List.of("alex", "ben", "chloe"); // a, l, e , x
        var flux1 = Flux.fromIterable(namesList)
                .transform(filterMap);

        var flux2 = flux1.concatWith(Flux.just("anna")
                .transform(filterMap));

        return flux2;

    }

  public Flux<String> explore_concat() {

        var abcFlux = Flux.just("A", "B", "C");

        var defFlux = Flux.just("D", "E", "F");

        return Flux.concat(abcFlux, defFlux);

    }

 public Flux<String> explore_concatWith() {

        var abcFlux = Flux.just("A", "B", "C");

        var defFlux = Flux.just("D", "E", "F");

        return abcFlux.concatWith(defFlux).log();


    }
public Flux<String> explore_concatWith_mono() {

        var aMono = Mono.just("A");

        var bMono = Flux.just("B");

        return aMono.concatWith(bMono);

    }

https://github.com/dilipsundarraj1/reactive-spring-webflux/tree/springboot3.0

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript

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Contributed on Jan 06 2023

Anjali Sharma

0 Answers Avg Quality 2/10

concat() and concatWith()

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