Hot questions

0 votes

1.8k views

1 answer

android - Flutter build appbundle R8: Type com.bundle.id.MainActivity is defined multiple times:

When I run flutter build appbundle it returns with the following error ./build/app/intermediates/javac/release/classes ... files called MainActivity. How should I fix this?...

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

0 votes

2.2k views

1 answer

mysql - "Duplicate entry" even though the column has UNIQUE constraint

I'm trying to drop some columns which I'm no longer using in my table. I've got a single column ... WHERE attackcode = "e3cce98b6aa8085ed6a960d2afcd4dca"; Empty set (0,00 sec)...

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

0 votes

2.8k views

1 answer

mysql有些字段是非必填的，传空要查所有数据该怎么处理？

SELECT * FROM content WHERE cityId='C-e834160464892529719476' and regionId='a-10c7160465073001499199' 其中cityId和regionId是非必填的，前端可以传空也可以传值 ... 我想要的是cityId和regionId传空就查所有数据，这该怎么优化呀？...

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

0 votes

3.0k views

1 answer

本地代码调试接口的时候火狐没问题，谷歌chrome就有问题？

chrome火狐chrome版本火狐版本同一套代码为什么chrome的响应头会有一个set-Cookie httpOnly 请求头没有cookie字段导致接口401，但是火狐的响应头没有set-Cookie请求头有携带cookie所以没有出现401. 请求使用的是axios， withCredentials也设置为true了。什么原因？...

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

0 votes

821 views

1 answer

Swoole 如何同时向多个客户端推送数据？

问题描述：有一台服务器需要在本地启动一个 TCP 服务，并向外暴露一个端口该服务器会产生一些数据，提供给需要的客户端，客户端如果需要，就去主动连接该服务器需求如下：当客户端连接成功后，才会向该客户端 ... , $fd) { ... }); // 启动 TCP 服务器 $server->start(); 请问这个场景怎样处理更合适一些？...

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

0 votes

1.0k views

1 answer

在vue脚手架中使用ts，为什么webpack entry 不支持ts 而js是可以的

本人亲自试过js是可以获取到的，而ts不行，ts就报错，前端菜鸡求大佬回答！！！ ./src/main.ts in multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.ts...

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

0 votes

2.5k views

1 answer

Python how to pass variables to SQLite complex SQL update Query

I have this SQL query that I confirmed works in SQLite. It updates two columns in the Table. I have 144 columns that ... " So what should I do? Any guidance is much appreciated!...

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

0 votes

3.0k views

1 answer

margin-top不生效问题，父div，子 a

.page-foot { display: inline-block; border: 0px; width: 100%; height: 50px; position: fixed; bottom: 0; } .a-download { pointer-events: none; ... 网上的方法试过了都没用，当然我最终是要flex的，超不超过似乎没关系...

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

0 votes

1.2k views

1 answer

webpack5 的 SplitChunksPlugin 插件无法将 js 分离问题

官方提到： SplitChunksPlugin 插件可以将公共的依赖模块提取到已有的入口 chunk 中，或者提取到一个新生成的 chunk 我写了一个 demo 项目，目录结构如下： webpack.config.js ... 的 console.log(123) 明显执行了两次这是因为 print.js 不是 node_modules 里导致的吗？...

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

0 votes

975 views

1 answer

在DolphinDB中dropTable()删除某个表后为什么原路径还存chunk.dict文件？

我在DolphinDB中用dropTable()函数成功删除了某个已经创建的表，但是为什么原来的文件夹下还有chunk.dict这个文件?...

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

0 votes

1.1k views

1 answer

mac系统怎么安装基于APR的Apache Tomcat本机库

[main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent 在java.library.path:[/Users/muyuchen/Library/Java/Extensions:/Library/Java/Extensions ... 一直报这个错误，这个APR是啥啊？（新手一个）...

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

0 votes

2.3k views

1 answer

jQuery slider滑块的值分布问题

做了一个滑块，值的范围为0-80，是一个多节点的，分别是[1,10,20,40,80] 我设置了values，但是实际着几个节点之间的距离不相等，我想把这几个数值均匀地分布在滑块上，请问该怎么做呢？已经尝试了好几种方法...

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

0 votes

1.7k views

1 answer

Can I mix MySQL APIs in PHP?

I have searched the net and so far what I have seen is that you can use mysql_ and mysqli_ together meaning: <?php $con= ... if the connections are valid at all? (the if(mysq...))...

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

0 votes

2.6k views

1 answer

android studio - Looking up a deactivated widget's ancestor is unsafe) flutter

this is my splash screen and I provide the future method to navigate automatically to another screen, class SplashScreen ... !!!!!! here Test breaks when using Future.delayed...

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

0 votes

1.5k views

1 answer

My key does not work eventhough I pressed it already Python Pygame

import pygame, sys pygame.init() pygame.display.set_caption("test 1") #main Variables clock = pygame.time.Clock() window_size ... learn how to use PyGame so please help me thanks....

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

0 votes

1.1k views

1 answer

Nodejs 有没有什么办法可以快速比较文件夹是否发生变化，以及变化的文件？

我想扫描一个文件夹下的所有文件，对这些文件信息处理后写入数据库，现在遇到一个问题，就是怎么判断这个文件夹相比上次扫描时是否发生变化，程序是定时运行的，所以无法一直监听文件夹。谢谢！...

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

0 votes

1.1k views

1 answer

请问如何 Windows 像 linux ssh 远端连线使用?

请问如何 Windows 像 linux ssh 远端连线使用? 想要写一个 powershell cmd script 定期管理多台电脑想到 linux 有 ssh 环境可以做到请问换到 windows 如何做到呢? 期望效果 : 有 A ... (有windows xp,7,10) 想要远端 cmd 取得这三台电脑的资源利用状况，并且能远端管理资源...

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

0 votes

4.1k views

1 answer

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)

0 votes

3.6k views

1 answer

json - java.util.Date is parsing wrong dates with dates before 1912

I don't understand the reason why Jackson library is parsing wrong dates before 1912. I suppose the problem is the java. ... happens with dates before 1912. Jdk v1.8.0_101 Thanks....

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

0 votes

3.2k views

1 answer

如何优雅的整合不同开发方式开发的vue项目？

现在公司有一个用cdn引入vuejs方法开发的项目，和一个使用脚手架搭建的项目。有没有一个好的方案能将两者整合一下呢。因为需要从cdn项目跳转到脚手架项目，会公用一些缓存的东西，发布时要使用一个站点。现在能想到的办法就是将脚手架项目打包到cdn项目的一个目录下。但是这样开发的时候就很麻烦，因为是两个项目要分别跑起来，缓存之类的东西不能用了就。...

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

0 votes

3.5k views

1 answer

mongodb聚合查询：如何在$switch内引用数组内容？

mongodb:4.2.11 数组是这样的形式： { name : "....", supplier : [{"name":"谷歌",...},{"name":"微软",...}] } 现在的问题是： aggregate内 ... 要一个字符串，我需要在switch内引用所有supplier.name，测试过了无论是switch还是cond都是无法用.引用 ...

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

0 votes

3.8k views

1 answer

Vue.js中怎么判断是开发环境还是发布环境？

怎么判断是开发环境还是发布环境？我有一个config.js文件，在里面我想配置为大概这样： var api_root = undefined; if (DEV_ENV) { // 开发环境 api_root = " ... api_root = "103.22.43.12:8000" } 请问这个DEV_ENV在vue.js项目中是有的吗？...

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

0 votes

4.0k views

1 answer

html - How to create even cell spacing within a <table>

I have been working on a small. However, I have a table where the cells are all sized automatically by the size of the text in ... > <td>car</td> </tr> </table> Thanks in advance....

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

0 votes

3.8k views

1 answer

java - Pyramid inside a rectangle pattern

I am having difficulty finding a suitable solution to stop the recurrence of blanks after the stars have finished printing, and this ... ] args) { pettren1(0, 0); } } my output...

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

0 votes

3.9k views

1 answer

vue.js - Vue CLI plugin CSS preprocessor (sass) transpile in parent

We have a pretty standard Vue CLI environment. It currently ingests a vue plugin we created via the install method. ... to import and transpile plugin sass style sheets? Thank you!...

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

0 votes

4.0k views

1 answer

nginx+ngrok https问题

图中所示的3001端口的程序（nodejs工程），目前使用http方式启动，访问正常但是，如果使用https启动，则nginx会报错502 这个有办法实现么？感谢！...

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

0 votes

3.5k views

1 answer

小程序如何下载字体并使用？

因为所需的字体包有点大，每次打开小程序使用在线字体时总会卡一段时间所以想把在线字体包下载回来使用，这样即可以绕开小程序不能打包字体的问题，也不用因每次渲染都要等在线的字体。想法是在wxss写好一个固定的@font-face，但不知道怎么给这个加url()路径……...

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

0 votes

4.3k views

1 answer

在线引用JS代码改为本地引用，无法生效

引用了国外某网站的JS代码，因为国内有时无法访问，于是把JS代码下载到本地，另存为polyfill.min.js，使用本地引用，但是不能生效，不知问题出在哪里下面代码引用正常 <script src="https ... .com/... 相关文件的下载链接：下面是相关文件的链接：https://www96.zippyshare.com/......

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

Categories

Just Browsing Browsing

Most popular tags