reactive

Dependencies in functions. Two functions working individually but when combined in code are showing error in Shiny

由 守給你的承諾、 提交于 2019-12-11 06:19:38
问题 I have 2 separate codes which work individually (Code A and Code B). When I club these codes to create single app, it shows error when both inputs are updated. Not sure where the error is? Code A library(shiny) dfaa <- data.frame(A = c( 1L, 4L, 0L, 1L), B = c("3","*","*","2"), C = c("4","5","2","*"), D = c("*","9","*","4"),stringsAsFactors = F) dfbb <- data.frame(variable = c("A","B","C","D"), Value = c( 2L, 1L, 9L, 0L),stringsAsFactors = F) dfbb["Drop_Variable"] <- "No" ui <- fluidPage

SmallRye Reactive Messaging's Emitter<>.send doesn't send in Kotlin via AMQP broker with Quarkus

由 情到浓时终转凉″ 提交于 2019-12-11 06:07:21
问题 Currently, I am trying to write a 'notification service' based on Maven, Quarkus and SmallRye Reactive Messaging in Kotlin. As a base I have an example in Java which works fine and I was trying to "translate" it into Kotlin. The way I want it to work is, that I send an HTTP request (e.g. GET http://localhost:8080/search/{word}) and the system sends the 'word' (here a String) to the queue 'queries' of the Artemis AMQP message Broker. Another system subscribes to the message Broker and fetches

For loop inside reactive function in Shiny

由 穿精又带淫゛_ 提交于 2019-12-11 05:33:18
问题 I met a problem with for loop in Shiny server and no one can find out how to fix it till now. I have been working on this for days but still didn't get any progress. Long story short, please just look at the following code. I was trying to fetch data from Google Finance and calculated the smoothed variance. stock2 <- reactive( getSymbols( toupper(input$ticker2), from = as.Date(input$date2[1]) - 150, to = input$date2[2], src = "google", auto.assign = F ) ) stock3 <- reactive(as.data.table

How to use vert.x-rx to create reactive client-server TCP communication

由 前提是你 提交于 2019-12-11 03:26:17
问题 I'm currently working on a project which requires TCP communication between an external system and an application which I will write (in Java). As we all know, this can easily be achieved using regular NIO. However, as part of this new project I'm working on, I have to use Vert.x to provide the TCP communication. Please refer to the image below: On the right, I have my application which runs as a TCP server waiting for a connection from the external system, on the left. I've read that to

accessing reactiveValues in a reactiveValuesToList

由 半城伤御伤魂 提交于 2019-12-11 02:13:19
问题 Instead of specifying separate fileInput variables, I'd like to use reactiveValues to store uploaded CSV dataframes, manipulate them in some way, and then store them for accession later. My design is to name each dataframe by its filename and append to the reactiveValue rvTL . My questions are, How can I access individual dataframes under the list I created using reactiveValuesToList(rvTL) ? Next step, how to create a selectInput menu to access the individual dataframes uploaded by fileInput

Convert an Observable to an async generator

由 こ雲淡風輕ζ 提交于 2019-12-11 01:48:51
问题 I'm trying to use rxjs in conjunction with babeljs to create an async generator function that yields when next is called, throws when error is called, and finishes when complete is called. The problem I have with this is that I can't yield from a callback. I can await a Promise to handle the return/throw requirement. async function *getData( observable ) { await new Promise( ( resolve, reject ) => { observable.subscribe( { next( data ) { yield data; // can't yield here }, error( err ) {

Migrate from RACSignal to ReactiveSwift or RAC5

由 白昼怎懂夜的黑 提交于 2019-12-10 21:05:20
问题 I'm new with Swift, and that's why I'm new with Reactive Cocoa v5 or Reactive Swift. Previously I used RACSignal with RAC 2.x and I liked to do something like this: - (RACSignal *)signalForGET:(NSString *)URLString parameters:(NSDictionary *)parameters { return [RACSignal createSignal:^RACDisposable *(id <RACSubscriber> subscriber) { AFHTTPRequestOperation *op = [self GET:URLString parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) { [subscriber sendNext

重磅来袭！Reactive 架构专场四城巡回演讲

由 孤街醉人 提交于 2019-12-09 21:05:16
Reactive 究竟是什么？Reactive 对架构设计的影响和冲击，以及给开发方式带来的改变有哪些？为什么阿里巴巴、Pivotal、Facebook 纷纷在生产环境中实践 Reactive？ 本次的四城巡演活动中，我们请到了著名的 JAVA 布道师 JoshLong、阿里巴巴 P9 雷卷以及 Netifi CTO Ryland Degnan 等国内外大牛现场为你解答以上疑问！ 活动亮点 著名 Java 布道师 Josh Long（龍之春）现场详解如何使用 Reactor、RSocket 进行编程以及 Spring Gateway 等 Spring 新特性； 阿里巴巴资深专家雷卷讲述阿里云上如何接入和使用 RSocket Broker？ Netifi CTO 将对 RSocket 进行全面介绍，包括 RSocket broker 的实现和功能以及 RSocket 等内容。 活动详情 北京场 时间：11 月 21 日 16:30-20:20 预约直播链接： https://developer.aliyun.com/live/1650 报名方式： 戳我报名 杭州场 时间：11 月 22 日 13:30-17:55 预约直播链接： https://developer.aliyun.com/live/1651 报名方式： 戳我报名 深圳场 时间：11 月 23 日 13:00-16:50

Spring Web Reactive Framework Multipart File Issue

由 若如初见. 提交于 2019-12-09 18:18:32
问题 I'm trying to implement and image upload using Spring's Reactive Framework by trying the following: @RestController @RequestMapping("/images") public class ImageController { @Autowired private IImageService imageService; @PostMapping(value = "", consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE) Mono<ImageEntity> saveImage(@RequestBody Mono<FilePart> part) throws Exception{ return part.flatMap(file -> imageService.saveImage(file)); } } But I keep

阿里雷卷：Reactive 基金会的成立将对开发方式带来哪些影响？

由 爱⌒轻易说出口 提交于 2019-12-09 17:34:02
作者 | 赵钰莹 近日，Linux 基金会宣布成立 Reactive 基金会。对于 Reactive，各位开发者应该并不陌生，尤其是 Node.js 开发者，但真正了解并意识到这件事情对开发方式带来的影响的恐怕不多。本文，InfoQ 有幸第一时间对推动阿里巴巴成为该基金会初创成员的阿里巴巴资深技术专家雷卷进行了独家采访，进一步全面了解 Reactive 基金会的成立背景及其对开发方式的发展推动。 Reactive 基金会是什么？ 近日，Linux 基金会 宣布启动 Reactive 基金会，旨在加速发展构建下一代网络应用程序的架构。该基金会由阿里巴巴、Facebook、Lightbend、Netifi 和 Pivotal 等初始成员组成。涉及成功的开源规范 Reactive Streams 和 RSocket，以及编程语言实现。 虽然 Reactive 基金会刚刚成立，但 Reactive，也就是开发者常说的响应式编程，已经发展多年。2011 年，Reactive 就开始步入大众视野， 当时微软在 .Net Framework 4.0 中内置了Reactive 支持，称之为 Reactive Extensions。2013 年，广大 Java 开发者熟知的 RxJava 发布。接下来，Reactive 进入飞速发展阶段，先后出现了 RxRuby、RxJS（感兴趣的开发者可以访问
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