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918 views

1 answer

node.js - Unplugging serial device causes error 'bad file descriptor'; reinitialising the serial port ends up receiving inconsistent data

The following node.js script scans all ports for a custom FTDI device and once the device is found, it checks its serial ... be glad if someone could help me out here. Thank you....

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

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639 views

1 answer

php - Google App Engine using PHP7 header() does not redirect the page correctly

I tried to use the header() function to redirect after user authentication on GAE. And I tried to get some ideas on GAE ... > </body> </html> And the problem showed like this :...

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

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882 views

1 answer

java 使用相对路径时，File::exist 是基于什么寻找文件的？

默认情况下，java.io 包中的类总是根据当前用户目录来解析相对路径名此目录由系统属性 user.dir 指定，通常是 Java 虚拟机的调用目录 @Test public void test02() ... test 成功在父模块执行debug maven test：父模块prj01执行 debug maven test 执行失败 ...

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

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940 views

1 answer

Kubernetes kubectl command to lookup Key in configMap or Secrets

I have about 10 ConfigMap and few secrets which stores my configuration in key and value. I am looking for any ... command which lookup all configMap or Serects to find my key?...

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

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1.4k views

1 answer

detect empty lists in R

i am calculating some values which are stored in a list and the list is appended to an alredy existing list, called results. In ... [1] TRUE How can i detect if a list is empty?...

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

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998 views

1 answer

javascript - remove It looks like you're using the development build of the Firebase JS SDK

I have been trying so hard to find out how to remove this warning. At first it looks simple I just need to ... verifyCapLoading = false } }) window.recaptchaVerifier.render() }) }...

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

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1.1k views

1 answer

spring oauth2 授权服务器和资源服务器可以在同一个包，怎么配置表单登录？

如题：配置以下注解后，在配置表单登录出现404。但配置httpBasic登录时，可以正常登录。...

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

0 votes

1.1k views

1 answer

小程序时间格式处理

formatTime: function (format = 'yyyyMMddhhmmss', time) { var formateArr = ['y', 'M', 'd', 'h', 'm', 's']; var ... getRegExp(formateArr[i] + '+'), returnArr[i]); } return format; }...

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

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1.6k views

1 answer

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)

0 votes

1.4k views

1 answer

兄弟们，MySQL三表关联查询优化，求救

我有3张表，分别是物流进出的表(stock_flow) 用户表(user) 商品表(product) 现在需要关联查询获取每个用户进出库了什么商品 stock_flow表结构 id 主键 uid 用户 ... 是 Using where; Using join buffer (Block Nested Loop) 现在就不清楚怎么优化，望赐教！...

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

0 votes

1.5k views

1 answer

Laravel Event Broadcasting and Notification

I haven a Laravel app with a chat functionality which is working with an event called MessageSent. This event is ... for broadcast on FCM and APN channels? Thanks in advance....

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

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1.7k views

1 answer

unity3d - Storing informations on different object ( Unity C#)

I'm trying to store informations about a Cube that is build out of 6 separate faces in a different GameObject. so ... } private void OnValidate() { Initialize(); GenerateMesh(); }...

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

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2.1k views

1 answer

Why does javafx-maven-plugin:jlink cause a java.nio.file.AccessDeniedException?

I am trying to use jlink as part of the javafx-maven-plugin plugin to create a runtime image with AdoptOpenJDK 15. ... path to the project has been omitted from the error message....

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

0 votes

1.9k views

1 answer

electron-vue 热更新后自动跳转应用窗口功能怎么关闭?

使用了 electron-vue 脚手架应该是自动安装了热更新模块, 导致每次代码编辑到一半然后自动跳转到最新的应用窗口每次都要切换很麻烦...有没有关闭这个跳转应用窗口功能的....求大佬...

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

0 votes

2.1k views

1 answer

从vue-cli2升级到cli3后build文件里的东西怎么配置到cli3中

从vue-cli2升级到cli3后build文件里的东西怎么配置到cli3中...

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

0 votes

2.1k views

1 answer

vue公用组件多项目使用问题

操作步骤若代码为私有的模块，因为某些原因不能发布到公共的npm仓库，但是又需要在多个项目间共享解决方法：可以在package.json中来使用git url获取特定的公用代码 ... gavinzhuleivue-form-making.git" as it does not contain a package.json file. 求各位大佬指指点点...

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

0 votes

2.5k views

1 answer

rabbitmq - Amazon Availability Zone Latency

We have a system setup on Amazon EC2's, divided between 2 availability zones. In our setup, we have a single RabbitMQ messaging ... , so I am limited in what I can see/adjust/etc....

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

0 votes

2.6k views

1 answer

VUE中 input双向绑定的v-model jsx写法 input的值无法清空如何解决?

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

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3.1k views

1 answer

How to pass values from one page to another by onclick in javascript?

1Page.js function TableRow() { let cells = document.querySelectorAll('#recieve-info td'); cells.forEach(cell => cell.onclick ... .getItem('passvalue')); } Here i want the values....

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

0 votes

3.7k views

1 answer

reactjs - React: Siblings in a list must have unique key. Do the children of these list siblings need them too?

I am generating a series of divs by using .map() on my state (created via the useState() React hook). Each ... with many nested elements within. Thanks in advance for your help....

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

0 votes

3.1k views

1 answer

vue用的swiper组件，后来用了uniapp

swiper组件和uniapp的swiper标签冲突怎么办，如果用uniapp的swiper有些效果无法实现...

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

0 votes

3.3k views

1 answer

r - in.omit only trailing (last) rows

I am trying to exclude only the empty rows that are at the end of a data.table. Is there a packaged and fast way of doing it? ... B=c(1,2,3,4,5,1,7)) d4 %>% remove_empty_row_last()...

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

0 votes

3.3k views

1 answer

New column keeping first occurrence of another column in r

The data is as follows: cat <- c('A','A','A','B','B','A','C','B') value <- c(1,1,1,2,2 ... want to create a new column which keeps the first occurrence of each 'cat'. Sample Output...

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

0 votes

4.0k views

1 answer

python - How can one extract date features from a date in pandasql?

I need to extract date features (Day, Week, Month, Year) from a date column of a pandas data frame, using pandasql. I ... , Humidity FROM df ''') df2.head() Data Frame Example:...

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

0 votes

3.5k views

1 answer

swift - SwiftUI: Question about SwiftUI's Lifecyle, I think... Object isn't created properly

I'm new to SwiftUI and I have run into an issue I can't explain. (I know its a lot of text but it would ... get the right value but in the last one momentaneübung is empty again....

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

0 votes

3.6k views

1 answer

奇怪的动画，代码如下

https://codepen.io/779102260/... <!DOCTYPE html> <html> <head> <style> body { height: 500px; } div { width:100px; height:100px; ... "800px"; // }); }, 500); } </script> </html>...

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

0 votes

4.5k views

1 answer

Android Studio - HTML to APK, file not found error

image I'm trying to convert HTML to APK, but when I run on the Android emulator, I got this error, ERR_FILE_NOT_FOUND ... specific, I'm trying to turn Twine SugarCube HTML to APK...

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

0 votes

3.7k views

1 answer

存入数据库时富文本的图片存地址还是base64？

如果是存地址的话，如果迁移服务器会有无法获取图片的问题，如果存base64可能会加载缓慢，请问有什么比较好的办法？...

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

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