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如题，看网上大部分文章都是说const { getFieldDecorator } = this.props.form，也就是说getFieldDecorator是form实例上的方法但是当我使用 ... (); const { getFieldDecorator } = form的时候，报错getFieldDecorator是undefined ...

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

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3.2k views

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nuxt首屏服务端渲染时，如何添加骨架屏或者loading

最近在使用nuxtjs开发项目，首屏通过服务端生产html文本直接返回给前端渲染，速度确实快了。但是如果在弱网环境下，前端发起请求到服务端返回数据的这段时间会有一段时间的白屏。有没有大神解答一下，如果我想一进入页面就显示一个loading的图标，等服务端返回数据时再让他消失要怎么做呢。...

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

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How to merge table cells in mediawiki

I'm trying to merge two cells of a table in mediawiki like so: Current table: hello world one col...

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

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python - scrapping <a href> and title from some <div class = "xxx">

I am doing web scrapping and have done this so far- page = requests.get('http://abcdefgh.in') print( ... beautifulsoup libraries in windows 10 using command prompt. Thanks, akhi...

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

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3.3k views

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有人使用过bootstrap fileinput 插件吗？他的断点续传服务端是如何用nodejs操作的？

最近做断点续传，因为不小心用了这个插件。但语言限制了我的知识点官方文档：https://plugins.krajee.com/fi... 因为它是用php语言做的服务端。服务端切片合并没看懂。nodejs需要什么流程呢。以及返回配置是否是这样？...

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

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1.6k views

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sql - Column Unknown Firebird Python

I'm trying to make a GUI with python and tkinter for a firebird database. When I try to write the input from boxes into the ... (0, END) data.delete(0, END) status.delete(0, END)...

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

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js或者jq可以模拟鼠标悬停在div上吗

有个hover悬停效果，想一进入页面模拟鼠标悬停让它显示效果，可以吗...

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

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css如何设置block子元素平均分布，并指定个数

<div class="container"> <div class="block"></div> <div class="block"></div> <div class="block"></div> <div class="block"></div> <div ... 数就会出现两遍分布宽度不均等的问题例如width:33%，请问有没有完美的实现的方法...

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

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3.0k views

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关于ES6数组解构赋值的问题

这是阮一峰老师的ES6入门书里的代码，利用数组的解构赋值特性交换两个变量的值 let x = 1; let y = 2; [x, y] = [y, x]; 以上代码确实在编辑器里能跑通，但是我试了下把分号去掉，浏览器报了y没有初始化的错 ... = 2 和 [x, y] = [y, x] 是同一个语句，我在第14行的断点打不下去，但是为什么是这样解析的呢 ...

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

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2.1k views

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javascript - How to save the current HTML file with JS

I write value in inputs and after clicking to a button it shows me in the table. But how I can save the current ... with JavaScript after adding new values to the table??? Pls help...

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

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1.3k views

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chrome有类似firefox的about:networking一样的功能吗?

目前遇到一个问题, 在firefox下复现不出, chrome下, 每2天左右出现一次, 现在想通过输出请求日志的方式, 看一下请求参数的一些信息. 类似于firefox中的about:networking#logging的功能. 但是, 在chrome中没有找到类似功能....

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

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1.9k views

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vue中使用xlsx后不能返回数据

// vue <input type="file" @change="importExcel($event)" ref="importExcel" id="importExcel" style="display:none;" accept="application/vnd. ... 现在的问题是：我封装渲染后想返回zdata，但是就是显示undefined...

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

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3.9k views

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Sum() using IIF() or Where Clause in MS Access

In my Report: BID is Billing Customer ID a TEXT FIELD. NPROFIT is Net Profit a NUMERIC FIELD. My Query sums NPROFIT for ... [NPROFIT]), "None") That does not work. Any suggestions?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.1k views

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docker-compose怎么配置nginx多域名、https

web容器Dockerfile： FROM node:latest MAINTAINER YW RUN mkdir -p /home/projects/web WORKDIR /home/projects/web COPY . ... container_name: web restart: always network_mode: host 跪求大佬指点...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.2k views

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twilio - SMS New Line from Azure Logic Apps

I am sending an SMS using Twilio using the 'Send Text Message' app block within Azure logic apps. I am struggling ... the expression builder. Am I missing something? Text Box Snip:...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

1 answer

react 函数组件可以实现继承类似的效果吗？

比如在插件的函数组件点击事件中：我希望如果组件指定那就调用统一指定的默认的点击事件，但是用户也可以自定义其行为，使用类比较好实现，但是现在基本都是函数组件，有什么方法可以做到？...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

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这段Python代码怎么优化？

originData = { 'a': None, 'b': None, 'c': 5, list: [{ 'a': 1, 'b': None}], dict: { 'a': 1, 'b':None}} def remove_none( ... 报复杂度过高，请问要如何优化呢？函数的目的是去除字典originData中的None值，Python版本是3.6...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.3k views

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js 双重for循环优化为.map写法

let permissionId = [] for (const i in menuList) { for (const j in permission) { if (menuList[i].id == permission[j].id) { permissionId.push( ... 化为.map的写法呢在这里先谢谢各位大神们的解答了，小弟感激不尽！...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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5.0k views

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android - Agora SDK : Can we add new member in ongoing 1-1 call?

We are building calling app in Android using Agora SDK. We checked this samples : https://github.com/AgoraIO/Basic- ... call. Does this possible? Please suggest us a correct way?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

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VScode 调试js代码怎么默认选择node环境？

最近在补数据结构，我用VScode调试js代码文件，每次按了F5, 都要我选择一下环境，很麻烦，去哪里可以配置默认的选项呢？希望它默认都用node环境。或者有没有什么调试JS代码更方便的工具？那个javascript shell貌似安装很麻烦的样子，没找到简单易懂的安装教程。。...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.9k views

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python - discord py - message.mentions "else" makes nothing

I want to get the user that was mentioned in a message and send him a private message. That's working without problems, but ... chat and just ignores it. What can I do to fix that?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.9k views

1 answer

vim 如何快速给字符串比如abc，两侧添加引号。

请问vim 如何快速给字符串比如abc，两侧添加引号。...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

1 answer

vue项目启动报This dependency was not found

这是协助别人做的项目，npm install后在npm run serve 报错。请问这是报vue in啥错误啊？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.0k views

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dolphindb 表连接问题

当左表和右表数据量都很大时要如何连接两张表...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.8k views

1 answer

tomcat响应文件的mime type的问题

现在有几个自定义类型的文件： A.data.gz A.framework.js.gz A.wasm.gz 我在web.xml里配置了 <mime-mapping> <extension>data.gz</extension> <mime-type>application/ ... 区分这几种文件类型的后缀名，请问应该怎么配置才能让tomcat返回正确的文件呢...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.6k views

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变量声明为什么都会返回undefined？

赋值语句返回等号右边的值，为什么声明变量的表达式总是返回undefined? demo： var a = 1; 返回undefined a = 1; 返回1...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.1k views

1 answer

dubbo重复调用两次，接口设置为retries=0，timeout=5000

dubbo重复调用两次，接口设置为retries=0，timeout=5000，接口依然调用两次，有哪位大神知道是咋回事吗...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.1k views

1 answer

npm包如何更新到最新版本

公司自己搭建了一个npm服务器，里面有公司自己的包，如何在package.json或者其他地方配置每次都获取自己最新版本的包 package.json↓ "dependencies":{ "my-package1":"^1.0.0", "my-package2":" ... } 如上图，前三个是公司自己的包，后面的都是外部的包，请问如果有更新，我要怎么更新...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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