Questions tagged [reactive]
The reactive tag refers to a variable type and environment used inside Shiny applications based in the R programming language. Reactive elements are dynamic and changing over time usually due to user input to the Shiny application. This tag should be used with questions and errors regarding how to refresh, update, assign, and access user inputs into Shiny. The reactive tag is to be used in conjunction with the r and shiny tag.
reactive
2,115
questions
229
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When to use RxJava in Android and when to use LiveData from Android Architectural Components?
I am not getting the reason to use RxJava in Android and LiveData from Android Architectural Components.It would be really helpful if the usecases and differences between the both are explained along ...
- 2,413
190
votes
20
answers
244k
views
How to find the invalid controls in Angular(v2 onwards) reactive form
I have a reactive form in Angular like below:
this.AddCustomerForm = this.formBuilder.group({
Firstname: ['', Validators.required],
Lastname: ['', Validators.required],
Email: ['', ...
- 2,954
100
votes
6
answers
56k
views
An equivalent to computed properties using @Published in Swift Combine?
In imperative Swift, it is common to use computed properties to provide convenient access to data without duplicating state.
Let's say I have this class made for imperative MVC use:
class ...
- 1,103
59
votes
5
answers
130k
views
How to check if Mono is empty?
I'm developing a app with Spring Boot 2.0 and Kotlin using the WebFlux framework.
I want to check if a user id exits before save a transaction. I'm stucked in a simple thing like validate if a Mono ...
- 1,224
47
votes
2
answers
22k
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Difference between @Controller and RouterFunction in Spring 5 WebFlux
There are two ways to expose HTTP endpoints in spring 5 now.
@Controller or @RestController by making the controller's class, e.g.
@RestController
@RequestMapping("persons")
public class ...
- 1,669
39
votes
3
answers
18k
views
Websockets vs Reactive sockets
I have recently come across a term 'Reactive sockets'. Up until this point, I used to think websockets are the way to go for full fledged asynchronous style.
So what are reactive sockets.
This link (...
- 1,169
35
votes
4
answers
69k
views
Vue change object in array and trigger reactivity
How can I trigger an update when altering part of an object found by index in an array?
The docs show how to alter the value of an array:
Vue.set(example1.items, indexOfItem, newValue)
or
example1....
- 2,348
31
votes
4
answers
66k
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Props gotten directly from vue 3 setup are not reactive
I am writing an application in vuejs and i want to pass prop to a child component but I am getting this error:
Getting a value from the props in root scope of setup() will cause the value to lose ...
- 1,201
31
votes
4
answers
39k
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Spring WebFlux throws 'producer' type is unknow when I return value in the response body
I'm using Spring Boot with Kotlin, and now trying to get status value from a GET restful service by passing a handler for a reactive service.
I can see that the handler I'm passing is in the request, ...
- 1,559
31
votes
4
answers
23k
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ReactiveCrudRepository to use Hibernate in spring
Is it possible to use Hibernate and RDBMS(Mysql, Postgres etc) with ReactiveCrudRepository instead of CrudRepository? I have tried some samples with Spring Data Jpa and Hibernate, but couldn't get it ...
27
votes
2
answers
19k
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Reactive Spring WebClient - Making a SOAP call
I am looking to make a SOAP call from spring reactive webclient.
I couldn't find any documentation for it. Wondering what would the approach. Right now I am thinking
Construct the SOAP message ...
- 291
26
votes
2
answers
96k
views
PrematureCloseException: Connection prematurely closed
I'm using Web-flux/Reactive and Webclient, running it on Tomcat and spring-boot.
Everything works fine. I read a lot about it. The problem seems to be that whenever you use Webclient, you have to ...
- 595
25
votes
1
answer
13k
views
Should we use a reactive-stack web framework like spring webflux when we have blocking calls?
I'm trying to understand when we would use a reactive-stack framework like webflux.
I've read articles that seems to suggest that we would benefit from reactive approach when we have many blocking ...
- 1,614
21
votes
3
answers
30k
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Is it possible to get the first element from flux without converting flux into stream?
Is it possible to get the first element from flux without converting flux into stream?
- 695
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votes
2
answers
9k
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Why does Spring not provide reactive (non-blocking) clients for relational databases?
I've used Vert.x toolkit for creating reactive applications with support for relational DBs like MySQL and Postgres. I know Spring provides reactive support for some NoSQL DBs like Cassandra and Mongo ...
- 2,884