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Is SQL or even TSQL Turing Complete?
...a cheating).
In this set of slides Andrew Gierth proves that with CTE and Windowing SQL is Turing Complete, by constructing a cyclic tag system, which has been proved to be Turing Complete. The CTE feature is the important part however -- it allows you to create named sub-expressions that can refer...
What is the global interpreter lock (GIL) in CPython?
... leverage multiple processors on a given machine. It runs on both Unix and Windows.
And the docs for concurrent.futures.ProcessPoolExecutor explain that it uses multiprocessing as a backend:
The ProcessPoolExecutor class is an Executor subclass that uses a pool of processes to execute calls asynch...
How can HTML5 “replace” Flash? [closed]
... @Luka Ramishvili - true, but it was not like OpenGL did not work on Windows. The hugely popular Quake 2 engine came out with either software or opengl rendering. Only later around the time of Half-Life did they then add DirectX support. I think it was just that Microsoft had money to throw at...
What is a MIME type?
...rves the same purpose on the Internet that file extensions do on Microsoft Windows.
So if a server says "This is text/html" the client can go "Ah, this is an HTML document, I can render that internally", while if the server says "This is application/pdf" the client can go "Ah, I need to launch the ...
Use 'import module' or 'from module import'?
... from module import * can be particularly useful, if using it as: if(windows):\n\t from module_win import * \n else: \n\t from module_lin import *. Then your parent module can potentially contain OS independent function names, if the function names in module_lin & module_win have same name...
How do I remove the passphrase for the SSH key without having to create a new key?
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On windows, you can use PuttyGen to load the private key file, remove the passphrase and then overwrite the existing private key file.
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Retrieving the last record in each group - MySQL
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MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY name ORDER BY id...
Should I use pt or px?
...browsers to render the letters exactly that number of pixels in height:
Windows, Mac, aliased, anti-aliased, cross-browsers, doesn't matter, a font set at 14px will be 14px tall. But that isn't to say there won't still be some variation. In a quick test below, the results were slightly more consi...
How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONP
... pathnames separated by os.pathsep (e.g. colons on Unix or semicolons
on Windows). Non-existent directories are silently ignored.
In addition to normal directories, individual PYTHONPATH entries may
refer to zipfiles containing pure Python modules (in either source or
compiled form). Exte...
Forward host port to docker container
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Same for Windows docker run --rm -it --net=host postgres bash then psql -h host.docker.internal -U postgres
– Leo Cavalcante
Jun 28 at 23:29
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