OStack Q&A-Knowledge Sharing Community

0 votes

303 views

1 answer

python - Matplotlib scatter plot with different text at each data point

I am trying to make a scatter plot and annotate data points with different numbers from a list. So, for example, I want ... .scatter(z, y, fmt='o') Any ideas? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

152 views

1 answer

Proxies with Python 'Requests' module

Just a short, simple one about the excellent Requests module for Python. I can't seem to find in the ... = requests.get(url,headers=headers,proxies=proxy) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

228 views

1 answer

python - Why does this iterative list-growing code give IndexError: list assignment index out of range?

Please consider the following code: i = [1, 2, 3, 5, 8, 13] j = [] k = 0 for l in i: j[k] ... 's something simple I don't understand. Can someone clear it up? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

384 views

1 answer

r - Why are my dplyr group_by & summarize not working properly? (name-collision with plyr)

I have a data frame that looks like this: #df ID DRUG FED AUC0t Tmax Cmax 1 1 0 100 5 20 2 1 1 200 6 25 ... idea why? and how can I make it do the right thing? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

92 views

1 answer

Correct javascript inheritance

I've been reading a lot of articles about "inheritance" in javascript. Some of them uses new while ... which I can extend RestModel or LocalStorageModel.) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

batch file - How to set environment variables with spaces?

I need to set values to a environmental variable using a batch file. I wrote the script for this: @echo off set value ... working too. Note: I am on Windows 7. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

90 views

1 answer

How do I import an SQL file using the command line in MySQL?

I have a .sql file with an export from phpMyAdmin. I want to import it into a different server using the command ... ? Do I need to create a database first? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

110 views

1 answer

How can one change the timestamp of an old commit in Git?

The answers to How to modify existing, unpushed commits? describe a way to amend previous commit messages that haven't yet ... a way to also re-set the times? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

158 views

1 answer

How the single threaded non blocking IO model works in Node.js

I'm not a Node programmer, but I'm interested in how the single threaded non blocking IO model works. After I ... would appreciate it if you could help me. :) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

125 views

1 answer

c++ - What is the difference between float and double?

I've read about the difference between double precision and single precision. However, in most cases, float ... ? What are the differences between them? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

327 views

1 answer

.net - What is the difference between IQueryable<T> and IEnumerable<T>?

What is the difference between IQueryable<T> and IEnumerable<T>? See also What's the difference between ... and IEnumerable that overlaps with this question. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

611 views

1 answer

rstudio - Change R default library path using .libPaths in Rprofile.site fails to work

I am running R on Windows, not as an administrator. When I install a package, the following command doesn't work: > ... /R-2.15.2/library" Isn't that strange? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

151 views

1 answer

Purpose of Unions in C and C++

I have used unions earlier comfortably; today I was alarmed when I read this post and came to know that ... answer continues to remain as the accepted one. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

71 views

1 answer

python - Keras, How to get the output of each layer?

I have trained a binary classification model with CNN, and here is my code model = Sequential() model.add( ... just like TensorFlow, how can I do that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

64 views

1 answer

javascript - ES6 class variable alternatives

Currently in ES5 many of us are using the following pattern in frameworks to create classes and class variables, ... would you have to handle this situation? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

324 views

1 answer

jquery - How to take screenshot of a div with JavaScript?

I am building something called the "HTML Quiz". It's completely ran on JavaScript and it's pretty cool. At the ... know a way to do this or something similar? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

126 views

1 answer

c++ - Is it safe to delete a NULL pointer?

Is it safe to delete a NULL pointer? And is it a good coding style? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

308 views

1 answer

eol - When do I use the PHP constant "PHP_EOL"?

When is it a good idea to use PHP_EOL? I sometimes see this in code samples of PHP. Does this handle DOS/Mac/Unix endline issues? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

182 views

1 answer

java - Servlet for serving static content

I deploy a webapp on two different containers (Tomcat and Jetty), but their default servlets for serving the static ... (so it looks in the static folder). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

77 views

1 answer

Number of lines in a file in Java

I use huge data files, sometimes I only need to know the number of lines in these files, usually I open them ... wondering if there is a smarter way to do that Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

428 views

1 answer

html - How to modify the fill color of an SVG image when being served as background image?

Placing the SVG output directly inline with the page code I am able to simply modify fill colors with CSS like so: polygon. ... "58.342" r="12.26"/> </svg> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

269 views

1 answer

Redirect non-www to www in .htaccess

I have this in my .htaccess file: RewriteCond %{HTTP_HOST} ^example.com$ RewriteRule (.*) http://www.example. ... to http://www.example.com/robots.txt? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

82 views

1 answer

c# - How to use WPF Background Worker

In my application I need to perform a series of initialization steps, these take 7-8 seconds to complete ... how I would do this using the BackgroundWorker? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

218 views

1 answer

r - Replace all 0 values to NA

I have a dataframe with some numeric columns. Some row has a 0 value which should be considered as null in statistical ... replace all the 0 value to NULL in R? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.4k views

1 answer

authentication - PHP Sessions across sub domains

I am trying to set up the following: auth.example.com sub1.example.com sub2.example.com If the user visits sub1 ... , just whatever key I set under each domain. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

452 views

1 answer

scala - Write single CSV file using spark-csv

I am using https://github.com/databricks/spark-csv , I am trying to write a single CSV, but not able to, it ... like path and file name and write that CSV file. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

115 views

1 answer

c# - Why are Cdecl calls often mismatched in the "standard" P/Invoke Convention?

I am working on a rather large codebase in which C++ functionality is P/Invoked from C#. There are many calls ... __stdcall in the C++? Thanks in advance! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

97 views

1 answer

How can I store and retrieve images from a MySQL database using PHP?

How can I insert an image in MySQL and then retrieve it using PHP? I have limited experience in either area, ... code to get me started in figuring this out. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Recent questions

Just Browsing Browsing

Most popular tags