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Welcome to Our Knowledge Sharing Community-Open, Learning,Share
Welcome to developer's Knowledge Sharing Community-Open, Learning,Share 欢迎来到 程序员专属的知识分享社区! 一个分享知识,传递知识,学习知识的社区!...
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Feb 5, 2021
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welcome
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How to model cross fragment transaction (ongoing process) in Android MVVM application?
I am developing an app that has some ongoing process that almost all screens depend on. Let's call it ActiveTransaction. So, one fragment prepares items, the ... the app State? I haven't found anything in the MVVM architecture guidelines....
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Jan 27, 2021
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javascript - Adding a "pause" functionality to a setInterval timer
I'm asking this because I haven't seen another solution in a similar layout to how I've done it. Essentially I'm building a simple countdown timer for a ... `; startBtn.style.display = "Inline"; pauseBtn.style.display = "None"; });...
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Jan 27, 2021
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javascript
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java - How to set correct time with AM PM with Calendar object?
Simple question why the result is like the following for this code: Calendar cal2 = Calendar.getInstance(); cal2.set(Calendar.HOUR, 12); cal2.set(Calendar.AM_PM, ... AM or PM multiple times change the result? How to set the time correctly?...
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Jan 27, 2021
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java
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601
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DolphinDB创建内存表时报错:std::bad_alloc
在使用DolphinDB创建一个内存表时,执行如下代码: appendRows = 100000000 dateRange = 2010.01.01..2018.12.30 ints = rand(100,appendRows) symbols = take(string('A'..'Z'),appendRows) dates ... 2020.10.21 12:41:06.400: executing code ... std::bad_alloc 请问是哪里出问题了?...
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Jan 27, 2021
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react 组件重新渲染机制
react组件 更新和渲染是两个不同过程,可以通过shouldComponentUpdate控制是否渲染 今天遇到一个问题,就是父组件数据list不放state里面,然后list通过props传给子组件,异步修改数据list时候,父子组件都没有触发更新和渲染,直接体现就是子组件拿到的props还是原来的 是不是可以 ... 听state的数据,然后触发对应的更新和渲染 不在state中的数据,即使绑定子组件props,因为父组件未更新,造成子组件props也不会触发更新 ...
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Jan 27, 2021
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react
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725
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Yii2添加request的baseUrl后加载的资源url也会加上这个baseUrl导致加载的不对
我的是Advanced版本,我frontend和backend是单独用不同域名的,由于怕权限管理里面跟前台的路由有相同的,所以就在后台的路径里添加个/admin 具体是在backend的main.php的components里添加baseUrl => /admin添加,添加后,页面是可以访问的,就是url多 ... ; 所以想问一下大佬们,怎样设置能让assets不添加这个/admin?感觉这个文件backend/assets/AppAsset.php里应该可以设置才对呀 ...
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Jan 27, 2021
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Technique[技术]
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575
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DolphinDB集群搭建后,在web界面启动数据节点时报错
按照DolphinDB多机集群搭建完成后,已经在server端启动了控制节点和代理节点,登录web界面,在启动数据节点时,出现如下错误: 请问哪里出问题了?...
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Jan 27, 2021
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Technique[技术]
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1.0k
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微信小程序预览是网络请求发不出去,真机调试就可以,配置了https合法域名
微信小程序预览是网络请求发不出去,真机调试就可以,配置了https合法域名...
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Jan 27, 2021
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Technique[技术]
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916
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Vue插件什么时候需要传插件实例给Vue构造函数
在用 vue + element-ui + vue-router + vue-i18n 刚开发完一个项目后,看到 vue-router 和 vue-i18n 都传了实例给 Vue 构造函数,而 element-ui 没有,想问问什么时候该传,什么时候不用传,原理是什么? 我的项目构造 main.js 文件: new Vue({ el: '#app', router, store, i18n, components: { App }, template: '<App/>' })...
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Jan 27, 2021
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Technique[技术]
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71.8m
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0
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1.4k
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1
answer
reactjs - React Three Fiber: Set Depth Write / Depth Test of of Drei Text
I'm using R3F with "Drei" and want to use the Text component. Unfortunately I need to set Depth Write and Depth Test to always have the text in ... read only property 'dispose' of object '#DerivedMaterial' Can someone help me please? Thanks...
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Jan 27, 2021
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reactjs
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1.5k
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json.net - Issue with serializing 'object' with System.Text.Json
I need to store an unknown JSON structure from an external API, but when I serialize the data using System.Text.Json, the JSON output is incorrect. A ... Microsoft article on migrating from Newtonsoft.Json, but I don't fully understand it....
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Jan 27, 2021
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json.net
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1.3k
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1
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c - Is there a more efficient way to reverse decimal numbers?
I am trying to reverse decimal numbers more efficient. #include <stdio.h> int main() { while(1) { int a,result; scanf("%d",&a); result=(a%10*10)+(a/10 ... am trying to find out how I can reverse more numbers in an efficient way ( less code)...
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Jan 27, 2021
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c
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html - I create Fade in and Fade out effect using Css different ease but
I create Fade in and Fade out effect using different CSS ease using this site: https://developer.mozilla.org/en-US/docs/Web/CSS/animation-timing-function I use few ease ... in not out i want fade in and out in loop never stop it.</h1>...
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Jan 27, 2021
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html
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1.9k
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1
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How can I send a file using to a HTTP server and read it?
So, I created the following HTTP server tunneled via ngrok, and I am trying to send a file to the server, to then read it and display it on the web page of ... Could someone please help me fix this error ? I don't get where it comes from....
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Jan 25, 2021
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How
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pivot - Create a SQL query that merges rows
I have a table that stores the dates when an order was opened and closed. It's similar to this: id orderID status date 1 1 opened 2020-01-01 2 1 closed 2020-01-05 3 2 opened 2020-01-02...
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Jan 24, 2021
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pivot
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react 打包上线 { children } 里面组件没有渲染 ?
打包环境没有展示出来dom结构 本地开发正常 代码写法 如果换成下面 <home/> <rules/>就可以展示 控制台打印的props都有的...
asked
Jan 24, 2021
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Technique[技术]
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71.8m
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react
0
votes
1.7k
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1
answer
TypeScript 参数变成 never 类型
add(data:any, toData:any, traversal:Function) { let child = new Node(data), parent :null |Node =null, callback = function(node:Node) { if (node.data === toData) { parent = node } } ... 函数明明给它作了一个赋值,这里却变成了 null 导致我后面的 parent 断言变成 never 求解...
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Jan 24, 2021
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Technique[技术]
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71.8m
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TypeScript
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1.7k
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1
answer
python - How to save scan results directly into a csv file in order to save disk memory instead of doing it within the script?
I'm wondering if someone would be able to help changing the below script logic, so it would create a csv file and append the file directly with results ... .DataFrame(statusList, columns=['Status']) df.to_csv('URLcrawl.csv', index=False)...
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Jan 24, 2021
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Technique[技术]
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python
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votes
1.8k
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answer
vscode 判断哪些vue代码没用灰色
在js是可以提示,在vue不行,是不是得安装什么插件 例如 let hh; 这行应该是灰色,因为hh没被使用...
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Jan 24, 2021
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Technique[技术]
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71.8m
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vscode
0
votes
1.7k
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1
answer
Flutter provider, question around Dart syntax
I'm relatively new to Dart/Flutter, Just struggling to understand some code/syntax and wondered if someone can help explain. Im looking at the example of ... where they are first instantiated Can anyone explain what is going on here? Thanks...
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Jan 24, 2021
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Technique[技术]
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71.8m
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Flutter
0
votes
1.9k
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1
answer
node读取文件失败怎么处理?
用fs.createReadStream和fs.readFileSync读取文件 但是一旦文件没有找到 就会报错 2020-12-23 16:42:44,082 ERROR 25598 nodejs.ENOENTError: ENOENT: no such file or directory, open '/Users/laiyinan/Desktop/2020114/jpg ... 退出 也就是整个后台都崩了 尝试用try catch包住 还是一样 如何处理? 报错的截图:...
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Jan 24, 2021
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Technique[技术]
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深蓝
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71.8m
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0
votes
1.5k
views
1
answer
css-loader模块化后伪元素的问题?
因为在webpack中使用了css-loader的模块化,所以在React组件使用css样式时,样式的类名变系统进行了自动转换,这样就出现了问题,如我的css样式名为.title,但是在react组件中,自动重命为了:.abc-123-xxx,这样的话我在css文件中定义的伪类样式就不起作用了,如我在css中定义了伪类样式:.title:after,请问这个问题大家是如何解决的?谢谢...
asked
Jan 24, 2021
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Technique[技术]
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71.8m
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0
votes
1.6k
views
1
answer
如下js是什么意思啊?目的是什么
var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?c6b94888ba8f8b5f249b4367e1598f9c"; ... document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })();...
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Jan 24, 2021
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Technique[技术]
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71.8m
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0
votes
1.8k
views
1
answer
使用electron-forge如何自定义应用程序exe图标
如题,我在windows下用electron做程序,我的自定义图标放在{项目文件夹}/image/icon.ico,是64x64尺寸的ico文件,main.js放在{项目文件夹}/interface/main.js,package.json就放在项目文件夹根目录 我在main.js中写: function createWindow () { const ... }, ··· ··· } } 结果exe文件的图标依然没有改变 请问我应该怎么做,才能使exe文件的图标改变?...
asked
Jan 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
0
votes
1.7k
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1
answer
Css not loading on node.js generated link
I'm using node.js, express and mysql. I have successfully followed these instructions to include my css file: How can I include css files using node, express, and ... css/style.css"> Can someone help what the problem is and how to fix it?...
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Jan 24, 2021
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71.8m
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Css
0
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1.4k
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1
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dependency injection - Is is possible to "autoConfig" gRPC services in Java Dropwizard?
I'm looking for something similar to the GuiceBundle.enableAutoConfig(MyResource.class) type of functionality but for a gRPC server. EnableAutoConfig ... ? Trying to avoid manual instantiation of dependency injected/provided components....
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Jan 24, 2021
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dependency
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1.3k
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vue history模式下进入到index.html 404
访问页面http://xxx/xxx/index可以正常访问 但是访问http://xxx/xxx/index.html 就会跳到404 这个是怎么回事啊 :可不可以访问index.html也能进到首页...
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Jan 24, 2021
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vue
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1.1k
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有没有实现自定义布局的插件,例如亿信的豌豆BI
随意拖拽,随意放大...
asked
Jan 24, 2021
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