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What generates the “text file busy” message in Unix?
...r is accessing your file. Use lsof to check what other processes are using it. You can use kill command to kill it if needed.
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#ifdef replacement in the Swift language
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Yes you can do it.
In Swift you can still use the "#if/#else/#endif" preprocessor macros (although more constrained), as per Apple docs. Here's an example:
#if DEBUG
let a = 2
#else
let a = 3
#endif
Now, you must set the "DEBUG"...
detect key press in python?
... key is pressed (such as p for pause and s for stop), and I would not like it to be something like raw_input that waits for the user's input before continuing execution. Anyone know how to do this in a while loop?
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How does BLAS get such extreme performance?
Out of curiosity I decided to benchmark my own matrix multiplication function versus the BLAS implementation... I was to say the least surprised at the result:
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HashSet vs. List performance
It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class.
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Design RESTful query API with a long list of query parameters [closed]
...a few filters. The usual HTTP method for this is GET. The only problem is, it can have at least a dozen filters, and if we pass all of them as query parameters, the URL can get quite long (long enough to be blocked by some firewall).
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Zoom in on a point (using scale and translate)
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The better solution is to simply move the position of the viewport based on the change in the zoom. The zoom point is simply the point in the old zoom and the new zoom that you want to remain the same. Which is to say the viewport pre-zoomed and the viewport post-zoomed...
When a 'blur' event occurs, how can I find out which element focus went *to*?
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Hmm... In Firefox, you can use explicitOriginalTarget to pull the element that was clicked on. I expected toElement to do the same for IE, but it does not appear to work... However, you can pull the newly-focused element from the document:
function showBlur(ev)...
Difference between LoadFile and LoadFrom with .NET Assemblies?
I was looking at the msdn documentation and I am still a little confused on what exactly is the difference between using LoadFile and LoadFrom when loading an assembly. Can someone provide an example or an analogy to better describe it. The MSDN documentation confused me more. Also, Is Reflecti...
How do I change permissions for a folder and all of its subfolders and files in one step in Linux?
I would like to change permissions of a folder and all its sub folders and files in one step (command) in Linux.
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