Recent questions in Technique[技术]

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Processing incoming payloads as batch not working as expected in spring-cloud-streams

I say 'not working as expected' but actually is more like 'I don't really know if I'm doing the proper work in here', I feel like I'm mixing stuff ... the code to batch all those String messages into a List? Is there any example on this?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ajax怎么设置Request headers里面的值

$.ajax({ ... beforeSend: function(request) { request.setRequestHeader("abc", "111"); request.setRequestHeader("Cookie", "ID=a12b4ea7e25e"); }, }) 它报错Refused to set unsafe header "Cookie" 为什么abc可以cookie不行，要在请求头携带cookie咋搞...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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802 views

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laravel - PHP - fsockopen function timeout not working

I have recently started timing the connection to the server. Surprisingly, some calls take even 10-20 seconds, even though my timeout is set to 1 second. What am I ... ); if ($info['timed_out']) { $this->timeout = true; return false; }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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colors - How to find HSV values from a certain area as average in a video, python?

I'd like to extract the lower and upper of HSV values from area after click and crop it by mouse in video instead of an image. Note: if you run this ... (0) # close all open windows cv2.destroyAllWindows() Please help me. Thanks in advance....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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233 views

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如何让 flutter Text 的宽度等于容器宽度？

在设置 textAlign: TextAlign.left 后发现 Text 并没有像预期那样文字居左设置 backgroundColor 后发现 Text 的宽度很小，并不是等于容器宽度请问如何让 flutter Text 的宽度等于容器 ... .title, textAlign: TextAlign.left, style: TextStyle( color: Color(0xFFFFFFFF), backgroundColor: Colors.red), ),...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javax.websocket.Session 获取requestUri

如下图,在java中定义一个websocket,如下图所示 package com.litong.spring.boot.video.player.modlue.page.video.websocket; import javax.websocket.OnClose; import javax.websocket.OnError; ... .println("发生错误"); error.printStackTrace(); } } 如何在onOpen获取requestUri...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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table中的radio，怎么分开选择

for (var i = 0; i < td.length; i++) { dom += '<tr>' dom += '<td>' dom += '<span>同意</span>' dom += '<input id="CheckAll" name="CheckAll" type="radio" value="1">' dom += '< ... value="2">' ... ... 这四个radio中只能选择一个，请问以行来分隔选，每行可以选一个呢，老哥应该懂我的意思...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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358 views

1 answer

如何理解“OOP允许根据问题来描述问题，而不是根据运行解决方案的计算机来描述问题”？

如何理解下面这句话句话。 OOP允许根据问题来描述问题，而不是根据运行解决方案的计算机来描述问题。出自《Java编程思想》第一章对象导论。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Combine rows with same content

I am working with a tsv file that contains information on genetic variants. Given that this information comes from multiple databases, my file contains duplicate data. In ... conditional on the name, but I don't know how to do that....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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522 views

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golang if 多个条件怎么简写

if fileFormat == "csv" || fileFormat == "xlsx" || fileFormat == "xls" { } 提示能简写，但是不知道怎么写...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Android Studio编辑dart文件怎么设置换行缩进空格数

编辑区域已经设置了2个空格缩进，但是回车换行还是4个空格。每次还要手动调整缩进真的很多余，有没有方法可以设置下。比如 Text("Welcome") 换行后 Text( "Welcome") 再换行就是这样 Text( "Welcome", style: null, ) 手动格式化后会修正为2个缩进空格 Text( "Welcome", style: null, )...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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437 views

1 answer

babel presets配置useBuiltIns报错，找不到corejs

babel配置polyfill时useBuiltIns: "usage",出现报错，这个选项需要在页面手动引入core-js么 { "presets": [ [ "@babel/preset-env", { targets: { browsers: ['> 1%', 'last 2 versions', ' ... -typescript" ], plugins: [ ["import", { libraryName: "antd", style: 'css' }] ] }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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256 views

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谁知道这个在vue里怎么用

想在vue里面使用这个 https://github.com/Dador/JavascriptSubtitlesOctopus 但不知道应该怎么引入，有谁知道吗？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

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Spring Kafka consumer removed from consumer group when topic idle

Versions Spring Boot 1.5.x, Spring Boot 2.4.x, Apache Kafka 0.10.2 The Situation We have two service instances hosted on different servers. Each ... the consumer group without having to restart the service and what are the downsides?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Swift How To - First/Where statement checking array of optional objects - unwrap and match

I have an array of objects that are all of class PFObject. I have a subclass of PFObject called GameCategory where some of the PFObjects in my array are ... code returns the error 'Missing return in a closure expected to return 'Bool'....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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408 views

1 answer

springBoot 配置动态数据源 mybatis Plus 不生效，有没有帮忙解答一下

...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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200 views

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Python如何给数组快速赋值

遇到一个数组快速赋值的问题需要解决，具体问题如下：有一个1280*960的大小的初始化为0的数组二维数组： ndarray=np.zeros([1280,960]) 我已经知道其中某些位置的值，例如(3,4)=10表示3行4列应该赋值10，我己经将赋值的存储下面的字典类型 : dcit={(3,4):10, ( ... 然后赋值，但是效率太低，请问有什么方法可以快速的根据dict的位置坐标和值给ndarray赋值考虑是不是pandas可以搞定，麻烦有经验的可以告知，谢谢！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Maven多模块项目打包过大

模块A依赖>模块B依赖>模块C; 例如模块B中依赖了多个包1,2,3;模块A打包的时候也会将这些包再打包一遍; 导致项目最后打包的出来的jar包,模块A中有123,模块B也有123,包体过大; 虽然不影响使用,但是有什么办法可以优化吗; 感谢...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer

如何识别网页是否在 PWA 环境下运行？

最近发现 PC 端的 chrome 和 edge 似乎已经默认支持将任何页面安装到桌面，写不写 manifest 已经无所大谓，普通网页和 PWA 的界限十分模糊。很难否认这个改进的进步性，但是网页的安装方式藏得很深，普通用户肯定没有动力去研究并且给自己桌面添堵，所以我希望能给那些以快捷方式进入网页并以单独窗口运行的用户更好的浏览体验，来促成安装。悲催的是我没有找到识别 PWA 运行环境的法子，各位可有妙招？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer

javascript - React Native Firebase Get Document by Field Value (Wildcard) (doc path) Works in React but Not in React Native

I will explain the issue below, but can say I think this line works for me in React but does not in React Native: const postDocument = ... ; const postDocument3 = firebase.firestore().collection('posts').doc('qRHqV8w6iyx4yHWg76tN');...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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86 views

1 answer

html - Console.log error when clicking an input type="date"

Im using HTML5 and adding an input with a type="date" for date picker but when i have developer tools open, everytime i click in my input i get the ... " class="form-control text-uppercase" type="date" /> Sceenshot of my console.log...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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359 views

1 answer

面试题:python中不使用int将字符串型数字转为整形

一道面试题 s = '520' 如何不用int()将s转为整形？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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304 views

1 answer

routes - Laravel: how to get the url prefix in case of a 404

In the RouteServiceProvider::mapWebRoutes I add a certain prefix (the "locale" in this specific case): protected function mapWebRoutes(string $prefix = ''):void { ... prefix back from Laravel, since it should know the value at that point....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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outliers - tso package in R

I am detecting different outliers from a series, and every time I run second variable from second column in a series I get this error below: Error in solve.default( ... , "IO", "SLS"),maxit.iloop=12) outliers_excess_ts How can I solve this?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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308 views

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<T extends Comparable<T>>和implements comparable<T>有什么用法上区别吗

<T extends Comparable<T>>和implements comparable<T>有什么用法上区别吗...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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224 views

1 answer

分步步骤，怎么修改点击下一步圆圈2高亮，圆圈1变成打钩的样式？

HTML代码： <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>jquery简单步骤</title> <link rel="stylesheet" type="text/css" href="css/style.css"> <script src=" ... 圆圈2会高亮显示，圆圈1也是高亮显示，怎么改成点击下一步，圆圈2高亮，圆圈1变成打钩状态？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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214 views

1 answer

java - bindingResult.hasErrors() not working, always get duplicate error

So i create register, and when i try register account with same mail that's already in database i got error massage "Duplicate entry". i tried use bindingresult but ... return "redirect:/Login?fail"; } return "redirect:/Login?success"; } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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175 views

1 answer

Convert Shiny App R code to Rmarkdown Shiny App code: with observeEvent and eventReactive

I want to use Shiny Action buttons in rmarkdown file. Can you help please to rewrite the following code (from https://shiny.rstudio.com/articles/action-buttons ... .rstudio.com/t/convert-shiny-app-r-code-to-rmarkdown-shiny-app-code/92876...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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