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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.

2049 questions
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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 with sample example in the form of code which…
rahul66
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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: ['', Validators.required,…
sa_
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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 ImperativeUserManager { private(set) var currentUser:…
rberggreen
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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 is empty. fun createTransaction(serverRequest:…
voliveira89
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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 PersonController { @Autowired private PersonRepo…
Deepak Kumar
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3 answers

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 (http://rsocket.io/) even talks about comparison…
Arunkumar Srisailapathi
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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.items.splice(indexOfItem, 1, newValue) But how to…
shanemgrey
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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 done. I was only able to find a few samples on…
Thomson Ignesious
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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, but whenever I'm building the body, I get this…
hasan.alkhatib
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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 using JAXB on a separate thread pool Make the call by…
Faisal Masood
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4 answers

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 reactivity Parent component