Recent questions in Technique[技术]

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问题描述我试着用sync.WaitGroup限制协程数量，来写一个端口扫描器，但当协程数量过多的时候，扫描出的结果达不到预期如：设置1000协程，可以扫出80,443,8000,3389 然而设置2000协程后，只 ... {127.0.0.1 80} open {127.0.0.1 631} open {127.0.0.1 3306} open...

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

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392 views

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node.js - How to connect to mongoDB using mongoose

I can connect to mongoDB database using mongoclient const MongoClient = require("mongodb").MongoClient; const fs = require('fs' ... , ca file and all these things? I am confused....

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

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javascript - Using async/await with a forEach loop

Are there any issues with using async/await in a forEach loop? I'm trying to loop through an array of files and await on ... I just wanted to ask if there was any issue with this....

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

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前端面试：设计一个数据结构

面试官说有一个业务场景，比如某件商品的子类型有三项，尺码颜色类型用户点击这三项没有顺序，有可能先点尺码再点别的，也有可能先点颜色但是每点击一项后，其它两项都会跟着改变比如先点了M尺码后，颜色里断货的置灰，类型里断货的也 ... 每次点击前端这边怎么处理逻辑？类似于图片上的业务场景，虽然图片上只有两项，面试官问的三项更复杂求大佬解答，谢谢...

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

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angular - How to find the root cause for peaks in ngAfterViewChecked-calls()?

Using a console.log() in Angular's ngAfterViewChecked-callback-function shows that it is getting triggered way too much in a ... to find out what causes the DOM-change then again....

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

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202 views

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vue表单如何设计

各位大佬，我有一个表单，其中一个表单原来是这样显示的。勾选了复选框后输入对应的份数，所有后端就应该获取两个数据，一个是复选框对应的值，以及复选框对应的文本框数据，但是这样获取太麻烦了，后端数据库也不怎么设计对应数据，有没有大神给一个好的办法。...

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

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Chrome浏览器的开发者工具中查找到唯一的一个元素为何无法高亮显示？

打开chrome浏览器(版本：84.0.4147.89） F12打开开发者工具按CTRL+F开始搜索比如用bing.com为例，搜索框的css语法是#sb_form_q 但是结果并不会高亮显示（以前的版本是可以的），但是当多个结果的时候，第二个开始能高亮显示。...

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

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python 3.x - How to output results in dash plotly?

I am trying to output my machine learning model results which are in list to Toast component (dash bootstrap)] and ... = "__main__": app.run_server(debug=True) Moreover, I tried...

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

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650 views

1 answer

el-select鼠标移到下拉框后选项就变成了一个？

这里是界面然后data里定义的数组直接从官方文档复制的代码下拉选择的时候，一开始是正常的但是！！！！鼠标移上去，就变成了一个选项就是下面这样，代码都是直接复制的，那是哪里出错了呢？？？新手，大神望指教一下+_+...

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

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284 views

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实现不定个数的li等宽自适应ul

想要实现如图的效果，li宽度相等，并且自适应ul的宽度。 li个数不是固定的，图中一行为9个li，当屏幕宽度变小，可能会8个或更少，但在屏幕宽度变化的过程中，要保持li的宽度相等并且始终充满ul的宽度。应该怎么实现？...

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

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234 views

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WPF .Net Core 3.1 AddSingleton 作用域无效

### 问题描述在App.xaml.cs中注入了Config类的单个实例, 在MainWindow中对修改了config的属性, 但是在Blaster中config是一个新的实例. ... config; _path = Environment.CurrentDirectory + "\cache.tmp"; ReadData(); }...

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

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1.1k views

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为什么 SF 的内容页面要登录以后才可以复制？

前几天看到 gitee 需要登录才可以下载代码包，很是惊讶难道技术社区不是开放的原则吗？现在无意间看到 SF 也需要登录才可以复制，突然是倍感失望终究是利益牵扯吧，用 GitHub 这么久也没发现需要登录才可以克隆包；登录才能复制的情 ... 展放贷哎，说远了！有人会因为限制复制这一点会全局否定你们的，离开了不会再来的那种且行且珍惜咯 ~...

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

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Is there any working reference for Magento 1 custom rest api?

I have been searching source for Magento 1 custom API but could not find any which worked as expected. I know ... result https://github.com/themizzi/Custom-Magento-Rest-Api2.git...

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

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有什么方法能让el-tag接收一个方法是用来判断他的type的方法呢？

自己二次封装了一下el-table,其中有判断是否要将数据用el-tag的形式展示，这是其中一个表头的信息，因为有的数据需要用不同el-tag展示，所以想到写一个方法来判断这列应该显示那种type的tag, tag_style ... 文档，el-tag的type只接受string类型，想请问是否有其他办法能控制根据表格不同数据展示不用类型的el-tag？...

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

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linux 通过端口号怎么找到对应进程的线程

linux 通过端口号怎么找到对应进程的线程...

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

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javascript - Adjust height of React Cards without including collapse

Im creating a web interface which is listing various processes and services. These are all listed in React cards which ... know how to go around this problem? Thanks in advance!...

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

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291 views

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deployment - I dont can deploy on heroku

I want to deploy, but it still dont work. There is a bug with discordjs / opus. I do not know why Here is the error Code: https://pastebin.com/qwkRGxNZ...

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 ... ", 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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837 views

1 answer

mongodb - How to provide server-side pagination with NestJS?

Given a MEVN stack using Nestjs, MongoDB(mongoose) I am working to setup server-side pagination. My approach ... : Mongoose Plugins nestjs SO: Pagination with mongoose and nestjs...

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

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131 views

1 answer

How do I show only months in Flutter using table calendar or calendar carousel?

I'm trying to make a calendar that shows only months in Flutter using table calendar or calendar carousel. Is there a way ... ? Or should I make my own calendar? Please help me....

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

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80 views

1 answer

在python中怎么建库建表

我在DolphinDB GUI中创建了如下分布式数据库表，它是分区类型是组合分区，第一层按日期值分区，第二层按设备id范围分区 dbName="dfs://forwardtekDdb1" tableName="windTurbine" login("admin"," ... 节找到了创建分区表的例子，但它是值分区，不是组合分区，我还是不知道应该怎么写 ...

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

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312 views

1 answer

html - FRAME src attribute: Do I have to URI-encode the value?

Are there any requirements / specs regarding the src attribute of a FRAME, especially if I have to URI-encode (percentage ... stackoverflow.com?param=??ü"/> </FRAMESET> </html>...

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

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174 views

1 answer

How can I change a number to a word in a column of a list in r?

I would like to know how I can change for instance the BMI 26 to "overweight"? I want to change the list. Should it be like ... obese = between(BMI, 30, 34.9), extreme = BMI > 35)...

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

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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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231 views

1 answer

Linux网络怎么设置？

Linux网络怎么设置成gfdgr.2366...

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

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892 views

1 answer

flex 对老布局有啥干扰？

给一个布局效果完好且没用 display:flex 的页面，某标签上随意加入了display:flex。页面布局会出现什么异常？？请列出尽可能多的情况？...

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

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539 views

1 answer

python中的守护进程和linux中的守护进程有什么区别呢？

百度查到的是：在python中说进程以守护进程的形式启动，那么在主进程结束时，守护进程就会被强制结束在linux中用程序用守护进程的形式启动，那么程序就会在后台运行 linux中的守护进程一般会从开机运行到关 ... =task,) # 在进程启动前，设置为守护进程 p.daemon = True p.start() print('主进程结束')...

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

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1 answer

windows - Receive data using Python sockets UDP IPV6 for a specific source address and port

im trying to implement a server client app with python using the sockets module ( ... . i.e: 0000000EC4030004004000000000000000000000000000000000000000000000 thanks in advance....

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

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