Convert observable to list
List<T> myList = myObservable.toList().toBlocking().single();
reactive-programming
FlatList onEndReached being called multiple times [duplicate]
This solution worked for me. Add onMomentumScrollBegin and modify onEndReached in FlatList Component. <FlatList style = { …} data = {data} initialNumToRender = {10} onEndReachedThreshold = {0.1} onMomentumScrollBegin = {() => {this.onEndReachedCalledDuringMomentum = false;}} onEndReached = {() => { if (!this.onEndReachedCalledDuringMomentum) { this.retrieveMore(); // LOAD MORE DATA this.onEndReachedCalledDuringMomentum = true; } } } />
RxJava 2.x: Should I use Flowable or Single/Completable?
Backpressure is what you get when a source Observable is emitting items faster than a Subscriber can consume them. It’s most often a concern with hot observables, not cold ones like your network requests. I think you should use Completable instead of Observable<Void> in your saveUser method, and use Single for all places where you … Read more
Recommended reading/tutorials to understand reactive-banana FRP library [closed]
Unfortunately, I haven’t written any comprehensive documentation or tutorials yet, mainly because the reactive-banana library is still somewhat in flux. This means that, at the moment, you’ll have to figure things out yourself from various sources, backed by a reasonably strong Haskell knowledge. What I can do here is to list the various sources and … Read more
block()/blockFirst()/blockLast() are blocking error when calling bodyToMono AFTER exchange()
First, a few things that will help you understand the code snippet solving this use case. You should never call a blocking method within a method that returns a reactive type; you will block one of the few threads of your application and it is very bad for the application Anyway as of Reactor 3.2, … Read more
RxJS distinctUntilChanged – object comparison
I had the same problem, and fixed it with using JSON.stringify to compare the objects: .distinctUntilChanged((a, b) => JSON.stringify(a) === JSON.stringify(b)) This code will work if the attriutes are in the same order, if not it may break, so here’s a quick fix for that (be careful this method is slower) .distinctUntilChanged((a, b) => JSON.stringify(a).split(”).sort().join(”) … Read more
How to override the width of a TextField component with Material UI?
You also can look at fullWidth property to make sure it is set properly. <TextField id=”full-width-text-field” label=”Label” placeholder=”Placeholder” helperText=”Full width!” margin=”normal” fullWidth // this may override your custom width />
Mono switchIfEmpty() is always called
It’s because switchIfEmpty accepts Mono “by value”. Meaning that even before you subscribe to your mono, this alternative mono’s evaluation is already triggered. Imagine a method like this: Mono<String> asyncAlternative() { return Mono.fromFuture(CompletableFuture.supplyAsync(() -> { System.out.println(“Hi there”); return “Alternative”; })); } If you define your code like this: Mono<String> result = Mono.just(“Some payload”).switchIfEmpty(asyncAlternative()); It’ll always … Read more
Using onBlur with JSX and React
There are a few problems here. 1: onBlur expects a callback, and you are calling renderPasswordConfirmError and using the return value, which is null. 2: you need a place to render the error. 3: you need a flag to track “and I validating”, which you would set to true on blur. You can set this … Read more
RxJava Observing on calling/subscribing thread
To answer your question, let me start from beginning, this allows other people to understand what you already know. Schedulers Schedulers play the same role as Executors for Java. Briefly – they decide on which thread actions are executed. Usually an Observable and operators execute in current thread. Sometimes you can pass Scheduler to Observable … Read more