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vscode开发Flutter时，怎样让补全提示具有相关性？

比如把光标移动到Container里的alignment属性，用"ctrl+space"调出属性提示，但是出来的是全部属性的参数。怎样让这个补全提示只显示适用于alignment的参数？...

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

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r - Reorder rows according to two column values in geom_tile() heatmap

library(tidyverse) df <- data.frame(country = c("USA", "USA", "USA", "UK", "UK", "UK", "Japan", "Japan", ... have the same values) 4th row: Norway 5th row: Germany 6th row: Japan...

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

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454 views

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MySQL8.0如何创建存储过程(create procedure)

以下代码报错 # MySQL 8.0.21 # Workbench 8.0.21 select * FROM products; CREATE PROCEDURE fn () BEGIN select prod_id FROM ... server version for the right syntax to use near '' at line 4...

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

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node.js - When calling the webpack CLI, is there a way to know if the build has been successful or failed?

I have a deploy.sh file that will call webpack like: webpack --config webpack.prod.js Does that call return ... script should continue or not. Any other solutions to this?...

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

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电商系统，随着业务越来越多，订单表字段会很多，请问表该怎么设计比较好？

### 问题描述业务越来越多，订单表字段会很多 ### 问题出现的环境背景及自己尝试过哪些方法目前是使用单表加详情表，使用订单类型区分不同的业务 ### 相关代码 ### 你期待的结果是什么？实际看到的错误信息又是什么？数据库怎么设计比较好！...

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

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关于git push出现【creation prohibited】的问题？

使用git push origin 远程分支时，提示老大说有权限是因为局域网的git配置和github的配置冲突导致的吗？这是什么原因，有什么解决办法吗？...

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

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How to publish RTSP stream from ip camera with gstreamer?

I have a rtsp-simple-server running on Debian and I try to publish RTSP from my ip camera (h264 + pcm ulaw) to ... com:8554/camstream1 protocols=tcp How can I stream video + audio?...

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

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Antd2和Antd3下使用Form+getFieldDecorator后引起重复渲染表单性能差

一个Form下如果有大量包裹了getFieldDecorator的Input组件的话，一旦一个Input的值发生变化，就会导致所有Form下组件全部重新渲染目前只能使用Antd2和Antd3，有什么比较简单的优化方案吗？ codesandbox重现链接： https://codesandbox.io/s/antd......

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

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c# - how can i build project and copy output dlls while publishing different project in one solution .net core VS2019

X and Y -> class library project (.net core) and X and Y has references Z(.net console application) project. I want to ... I can do Z.csproj file or Z buid event with macros ?...

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

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python - How do I loop through all the files of a folder and save the the files in dataframe format with their name of the file?

I have some Bson files along with its json metadata in a folder. I want to access all the Bson files(only) ... ] Permission denied: 'C:/Users/Lenovo/Documents/home/ubuntu/dump2020'...

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

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powershell - sql distinct statement not working in powershel script

I am trying to run the following sql command on a powershell script: I set the following as a ... FullyQualifiedErrorId : UnexpectedToken Please can anyone advise? Thank you....

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

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H5 IOS 原生中文输入键盘输入英文后直接点击完成获取不了input值

此时直接点击完成,vue双向绑定没有获取到姓名输入值求解!!!!!!!...

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

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sharepoint online - Check out not required but created files are in check out status

Today, for the first time, I watched an anomaly behaviour in all my SPO sites (all in classic experience). I have ... " status. My problem is I need these properties are visible....

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

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postgresql - SQL (Postgres): ON vs WHERE for better performance

I have a person and a task table. The task table is much bigger and contains millions of rows. With the following ... second statement as well? I cannot change the SQL statement....

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

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typescript - Angular - Using the value from an editable config file to define a DI token for a serviceURL

My application currently has a bunch of DI Tokens defined for service URLs that get their value from the ... other DI Tokens somewhere further downstream or something else?...

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

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c# - Problem with displaying glx_context - If you create GLArea using Gtk.DrawingArea for GtkSharp 2.x?

I have problem with showing of glx_context without GLib.Idle.Add(idlehandle) Code in Gist Result: It doesn't see ... glx_context on DrawingArea ( GLWidget )? Please tell me safe!...

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

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sql server - When do we use SET COLLECT_STATEMENT or COLLECT_OBJECT_NAME in an Ext. Event Trace?

I guess the title pretty much sums it up. I see these clauses used in examples all over the place, but I've ... if anyone can provide some insight I would be eternally grateful....

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

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223 views

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javascript导出excel或者csv如何让单元格内容换行？

尝试过使用n，效果变成整行换行了，如何让某个单元格里的内容换行？ <html> <head> <p style="font-size: 20px;color: red;">使用a标签方式将json导 ... ; link.click(); document.body.removeChild(link); } </script> </body> </html>...

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

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setState不会触发渲染？

RT 我想做一个根据路由参数不同，进入的时，下拉框默认选中不同的功能 const [selected, setSelector] = useState<number>(0) useEffect(() => { // 这个useEffect应该每次进入页面都会执 ... 之前的值当点击下拉框展示下拉列表的时候，才会正确的显示新的值这是为什么呢？？？？...

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

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python - Fit best estimator on all data (X_train, X_test) after pipeline

I created a pipeline for imputing nan values, SelectPercentile for feature selection and GridSearchCV ... .best_estimator_ mean_absolute_error(y_test,grid.predict(X_test))...

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

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366 views

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一段时间后会连不上mysql数据库

我部署之后，过了段时间就连不上mysql，在服务器通过mysql -u root -p，输入密码之后报错ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/ ... 2个项目，有一个使用sequelize，不知道是不是它的原因，请问有人知道这是为什么吗？...

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

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342 views

1 answer

spring boot打包后在服务器上无法读取resources下文件

打包后所有工程都是jar包，服务器上没法读到resources下的文件，网上找了很多文章说的解决办法都不行，各种读取方法都试过了就是读不到文件，以前用spring mvc的时候从来没有这种情况，对spring boot的打包运行机制不是很了解，不知道有没有解决办法？...

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

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556 views

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jQuery-ui中的resizable控制范围没有放大到指定大小？

拖入到表格中，resizable控制放大到外围的父级框（相当于元素父级的父级），如果向左放大只能向下拉着放大，向右拉着放大到这个大小就不行了，请问是什么原因，用的是jquery-ui.min.js，resizable中缩放也只写了containment: '#qemd',handles: "all",...

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

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344 views

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前端工作一般是怎么验收工作结果的？前端工作真的可以做到精确到1px吗？

我在尝试复制页面的时候，一个a元素，我就照着原页面的css computed的属性写的，发现怎么也不能够做到重合，后来我把整个页面拿来，一个div一个div的删除，发现字的的颜色会被它周围的内容影响到，也就是说，就当 ... 格，我会再做几遍，不改动css，仅删除script和部分div，再将当天的zhihu首页和我删除了部分内容的reduce版本进行比较 ...

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

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java - Why is a subclass constructor undefined in its parent class?

I have a problem here that is probably very simple to solve, but unfortunately I'm still a bit stumped. public final class ... and how can I fix it? Thanks a lot in advance!...

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

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libraries - VS code [python] doesn't run properly

So i've downloaded python two weeks ago, code is working, had few problems on libraries that were interrupted due ... , not sure if newbie mistake or need to reInstall everything...

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

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182 views

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请问Google Tag Manager，如何打开这个页面的？

...

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

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174 views

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不用框架怎么做前端？

想看一些不用框架的前端项目源码...

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

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