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Determining Whether a Directory is Writeable
What would be the best way in Python to determine whether a directory is writeable for the user executing the script? Since this will likely involve using the os module I should mention I'm running it under a *nix environment.
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How do I debug an MPI program?
...to any particular process, but I'm not really sure whether that's possible or how to do it. An alternative would be having each process write debug output to a separate log file, but this doesn't really give the same freedom as a debugger.
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How can I get the current date and time in UTC or GMT in Java?
...nce a fixed epoch, the value within java.util.Date is the same around the world at any particular instant, regardless of local time zone.
I suspect the problem is that you're displaying it via an instance of Calendar which uses the local timezone, or possibly using Date.toString() which also uses t...
Is there a way to check which CSS styles are being used or not used on a web page?
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Install the CSS Usage add-on for Firebug and run it on that page. It will tell you which styles are being used and not used by that page.
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Android REST client, Sample?
...s thread has accepted answer, feel free to propose other ideas, you do use or like
7 Answers
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Error: Can't set headers after they are sent to the client
...n and you can only call res.write(data), and finally res.end(data).
The error "Error: Can't set headers after they are sent." means that you're already in the Body or Finished state, but some function tried to set a header or statusCode. When you see this error, try to look for anything that tries t...
Which is better, return “ModelAndView” or “String” on spring3 controller
...uits your application better - Spring allows you to do it either way.
Historically, the two approaches come from different versions of Spring. The ModelAndView approach was the primary way of returning both model and view information from a controller in pre-Spring 2.0. Now you can combine the Mode...
Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
1) When an array is passed as an argument to a method or function, is it passed by reference, or by value?
8 Answers
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Why does one hot encoding improve machine learning performance?
...ing is used on a particular data set (a matrix) and used as training data for learning algorithms, it gives significantly better results with respect to prediction accuracy, compared to using the original matrix itself as training data. How does this performance increase happen?
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How to check for an active Internet connection on iOS or macOS?
... if I have an Internet connection on iOS using the Cocoa Touch libraries or on macOS using the Cocoa libraries.
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