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Checking if sys.argv[x] is defined
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In the end, the difference between try, except and testing len(sys.argv) isn't all that significant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'option']
args...
proper way to sudo over ssh
...--prompt="" -S -- "veracrypt --non-interactive --stdin --keyfiles=/path/to/test.key /path/to/test.img /mnt/mountpoint" << EOF
SudoPassword
VeraCryptContainerPassword
EOF
It should be noted that in all the command-line examples above (everything except the script) the << EOF construct o...
How to prevent browser page caching in Rails
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Agreed, this is not a valid solution, tested with Rails 5.2 and Chrome 77. no-store is also needed.
– AndrewSouthpaw
Oct 25 '19 at 4:33
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scala vs java, performance and memory? [closed]
...deep algorithmic thoughts), but I can also enter my code in obfuscation contests and potentially earn extra cash for the holidays.
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error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
...uch that whatever user mysqld is running as can read/write to it. An easy test is to open it up to full read/write and see if it still works:
chmod 777 /var/run/mysqld/mysqld.sock
If that fixes the issue, you can tailor the permissions and ownership of the socket as needed based on your securit...
Set EditText cursor color
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There is a new way to change cursor color in latest Appcompact v21
Just change colorAccent in style like this:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Set theme colors from http://www.google.com/design/spec/style/color.html...
What are dictionary view objects?
...ike", in that they don't support indexing, so what you can do with them is test for membership and iterate over them (because keys are hashable and unique, the keys and items views are more "set-like" in that they don't contain duplicates).
You can store them and use them multiple times, like the li...
Is it possible to download an old APK for my app from Google Play?
...fortunately, I didn't keep copies of all the old APKs, and now I'd like to test upgrade from the old versions to my new version. Is there any way to download Google's copy of my old versions? The Google Play developer console shows my old APKs, but without a download link. I tried "Real APK Leecher"...
How to get all files under a specific directory in MATLAB?
...Octave handles it ok (. and .. are still first) but I don't have MATLAB to test.
– mtrw
Apr 17 '10 at 0:36
2
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How do exceptions work (behind the scenes) in c++
... an error is rare, it can be faster, since you do not have the overhead of testing for errors anymore.
In case you want more information, in particular what all the __cxa_ functions do, see the original specification they came from:
Itanium C++ ABI
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