Recent questions in Technique[技术]

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384 views

1 answer

dataframe - How do I remove specified rows from a data frame in R, but the rows are eliminated according to another column variable?

I have a data frame of values, with variable names that correspond to co-ordinates and event time per simulation. head_data<-structure(list(x = c(987.353265152362, 570 ... But I need a more efficient way of doing so for a larger data frame....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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439 views

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c++ - Eigen templated function that accepts both Matrix col and vector

I can't understand how to write templated function that accepts both vector and matrix column? For example: template<typename T> void foo( const Eigen::MatrixX< ... I would like to pass dynamic size vector and, but not necessary, fixed size...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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541 views

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做vue SSR，之前在html中通过CDN引入的代码，现在是不是必须改用本地引入？如vue, element-ui，axios

还有 vuex 等。本地引入的话，那如何优化？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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498 views

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if statement - Who to » State if two are numbers Co-Primes A (8 bit ) and B (8 bit) ,State if A is T-Prime or not Using VHDL

Using VHDL who to ? State if two are numbers Co-Primes A (8 bit ) and B (8 bit) ,State if A is T-Prime or not...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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397 views

1 answer

中文编程需要文本编辑器或者IDE的支持

我把C++程序里的类名、成员函数换成中文，运行可以，但是源代码很难看 --- 中文没有色彩显示，而英文则是多姿多彩。文本编辑程序，没有把你的中文彩色显示。我查了查资料。似乎notepad++和sublime text都不能特别为中文的设置颜色；注释里可能有中文，注释中文和变量、函数中文应该用不同的颜色，这都无法设置。...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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320 views

1 answer

reactjs - Trying to convert html to pdg using htmltocanvas, blank page appears

I'm trying to convert my my page to a pdf. I have followed this post in order to do so: https://medium.com/@shivekkhurana/how-to-create-pdfs-from-react-components- ... </Container> <Button onClick={() => this.toPDF()}>Bla</Button> </div>...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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743 views

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在vue中用axios进行文件上传，浏览器占用的内存不断增大且不会降下去。这是什么问题?

无论是谷歌还是火狐浏览器，运行一段事件后占据的内存都比较大，这种怎么处理呢?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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261 views

1 answer

Blazor HTTPRequestMessage with several named parameters

Using the most recent version of VS 2019 Community with SDK 5.0.101 I have created an Editform and I can see on the button submit action that all the ... call a site with parameters so that I could proceed I'd very much appreciate....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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282 views

1 answer

amazon ec2 - Updating kubernetes with kOps causes calico-node to fail with "BIRD is not ready: BGP not established"

Let me preface this by saying this is running on a production cluster, so any 'destructive' solution that will cause downtime will not be an option (unless absolutely ... ) Path: /opt/cni/bin HostPathType: cni-net-dir: Type: HostPath (ba...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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291 views

1 answer

swift - SwiftUI transition(.asymmetric..) not working with Offset

I am working on a Set Game and I want the cards to swing on the view (from off the screen) via the .transition(.asymmetric(insertion: .offset(x: 100.0 ... want to see the full source code, you can check out the repository: Link SetGame Repo...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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592 views

1 answer

powerbi - Power BI can't connect to MySQL DB

I have created a database in MySQL called 'Sales Data' at server 127.0.0.1. I log into this database on MySQL workbench as user root with my password, ... installed all the necessary connectors, etc. Any idea why it can't find my database?...