Recent questions in Technique[技术]

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canvas如何再圆环外绘制小圆点

canvas如何再圆环外绘制小圆点...

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

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673 views

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element框架，el-table中遍历数组中对象里的数组，但组件渲染失败

组件渲染不出来，不知道为什么？然后后端返回的数据是这样的...

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

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319 views

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spring aop 切点表达式this() target()区别?

如题: this()和target()具体啥区别?...

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

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407 views

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WinSW制作jar为WIN系统服务遇到的问题

概述使用 springboot 制作了一个小项目用于拨号VPN，并且周期性检测该VPN是否在线，如果不在线就断开并且重新拨号我做了的测试使用 java -jar vapndialer.jar 在前台执行，拨号成功了使用WinSW.NET4 ... ，制作为服务后运行就显示没有该链接（上面的623表示没有该链接）是什么问题呢，要如何解决 ...

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

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211 views

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C语言中，空字符串中系统会自动添加吗

int main() { char Expr[10]; gets(Expr); return 0; } 提示输入，什么都不输入然后直接回车，这个Expr数组里会有/0吗...

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

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有办法用sql 查询已超出内存、并已持久化到磁盘的流表数据吗?

如上图所示，在DolphinDB内存表详解提到可对流数据表进行持久化，请教一下，在DolphinDB database中有方法可以用sql查询出超出内存的并且已经persist的流表数据吗? 如下图所示，我用时间范围查询，但是查出的数据范围还是内存表里的。...

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

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请问一下这2种图表。是自己手写吗？还是用插件啊？echarts里面好像也没有这种效果啊

如题，请问一下这2种图表。是自己手写吗？还是用插件啊？echarts里面好像也没有这种效果啊？第一个效果是236那几个数字的效果。第二个是下面那个多个圆形和里面不规则的三角形。的效果...

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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swoole websocket中创建tcp客户端，一直堵塞无法close

在websocket服务器中创建一个tcp客户端，然后一直while监听tcp服务端发来的消息，再通过websocket转发给页面，如果页面一刷新，websocket就会提示Provisional headers are shown 。原因是tcp客户端一直while监听recv消息堵塞在那。请求怎么处理。...

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

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738 views

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ant design vue中表格组件的数据全部默认选中

一进来到这个表格,里面的的数据要全部默认选中,而且新添加的内容,也要全部选中...

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

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c++ - Cant seem to work a second for loop with a pointer for an array

I have a simple program that calculates for mpg using arrays and pointers When I input miles, it works perfectly but when i input ... : "; cin >> *pt; return *pt; } Miles Gallons...

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

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1 answer

开发环境localhost怎么解决 cookie 认证问题？

问题描述：在登录之后，我怎么在 localhost 中获取登录页面（登录页面地址为 39.xxx）的 cookie 呢? 目前我所了解到的方法利用NGINX 进行反向代理利用 webpack 中的 proxy-pass代理上面两种都是 ... 它们是否就同源呢（domain 是否相同）？目前我测试出并不相同，并没有正确读取到 cookie 请各位指点 ...

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

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305 views

1 answer

vue脚手架eslint模式如何更换

在创建vue项目的时候选择了每次保存时执行eslint规则，现在感觉太烦了如何更改为 commit时执行呢？...

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

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746 views

1 answer

react-native 在ios目录 pod install 卡住

前提：已经按照 [CocoaPods 镜像使用帮助 -清华源](https://mirror.tuna.tsinghua....，安装CocoaPods 操作： npx react-native-cli init RNDemo # 脚手架安装，卡在安 ... 开小飞机，google使用正常，但还是卡在 pod install 这步有大神可以指条明路吗??...

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

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sql - How can we display first row and last row of given table using rownum without using union clause

Sample Input Name | Value | Timestamp -----|-------|----------------- One | 1 | 2016-01-01 02:00 Two | 3 | 2016- ... 02:00 2016-01-02 02:00 Two 4 2016-01-01 03:00 2016-01-03 04:00...

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

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304 views

1 answer

vba - Access allow addings but no edits in certain columns in a subform

I got question if it is possible to allow addings but no edits in certain columns in a subform? I can do this for ... to make any adds. Is there another way to make this possible?...

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

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299 views

1 answer

kubernetes - Install Linux package on launch when deploying Airflow with Helm in Azure Kubernets Service

I'm trying to install Airflow on Azure Kubernetes Service (AKS) using Helm. I've found some guides to do so, and ... but couldn't find anything Hope someone can help me on this....

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

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495 views

1 answer

VUE项目做服务渲染除了SSR还有什么其它方法吗？

SSR要用node 没有学过node 那么服务端渲染还有别的方法吗？...

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

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191 views

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python - how to load javascript in django templates

i'm trying to apply my JS file to templates but it doesn't applied. i tried using <script src="{% static 'js/main.js' %}" type ... 127.0.0.1/:20p://127.0.0.1:8000/static/js/main/js...

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

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有阅读App开发经验的大佬吗，交流一下书籍信息是怎么存的？书籍来源从哪里来的？

有阅读App开发经验的大佬吗，交流一下书籍信息是怎么存的？书籍来源从哪里来的？...

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

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166 views

1 answer

Docker remove <none> TAG images

root@server:~# docker images -a REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE <none> <none> 5e2dfc857e73 5 days ago 261.6 ... [OPTIONS] IMAGE [IMAGE...] Remove one or more images...

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

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675 views

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gin框架报了这样一个错是哪里出错了？

panic: http: wrote more than the declared Content-Length 使用postman发生了1000个HTTP请求报出来的错 package main import "github.com/gin-gonic/gin" ... "message": "pong", }) }() }) r.Run() }...

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

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240 views

1 answer

python - Can I add multiple images as canvas items and rotate them simultaneously?

I am trying to rotate images using canvas items. I was successful in doing it with one image. But if I want to perform ... Tk() app = SimpleApp(root, 'cat.jpg') root.mainloop()...

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

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271 views

1 answer

How to determine memory consumption of Sqlite in Java/Scala?

We use file based Sqlite via jdbc in our Scala app. I suspect we consume to much process memory using it as our Process ... not sure if I can use that in our JDBC based approach....

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

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890 views

1 answer

javascript - React JS - CORS Missing Allow Header when sending POST request

I have some problems with sending a POST request to my REST-API. The problem is, when I send it from a react application, ... ; response.json().then( responseJSON => { }); });...

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

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188 views

1 answer

sql server - In T-SQL What is the best way to handle groups within groups?

This issue is from a booking system, the task is to add a flag to the table and also produce total number of visitors. ... T 1003 391 Camping Fee 2 T 1005 401 Camping Fee 2 T...

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

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348 views

1 answer

Adjusting GUI size in Java Interface designing with NetBeans 12.0

I have designed a java GUI using NetBeans 12.0. The GUI runs in full screen(1920x1080) and I used absolute layout ... a way to fix this without changing the used absolute layout?...

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

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119 views

1 answer

mysql - Searching a string in a column

can anyone help me. i have a DB in mysql, and need to search for a string in a particular column. the field is var ... , and i need to search all of them. apologies for my english...

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

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336 views

1 answer

本地测试webRTC，对端视频死活开不了

本地测试webRTC，没报任何错，但对端视频就是死活都不开，问了几个群都没人答，自学者好难有没有思否大佬指点一下啊，先谢为敬问题补充：前后端都没报任何错我确定后端信令的转发是没有问题的现在贴一下 ... .0.0.0', function () { console.log('服务器开始运行！，http://127.0.0.1:3000/') });...

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

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