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Running bash script from within python
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The os.system documentation specifically recommends avoiding it in favor of subprocess (these days, subprocess.run()). If you can't get subprocess to work, chances are you'll have trouble with os.system() too.
– tripleee
Jun 2 at 2:03
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Regular expressions in C: examples?
...es of how to use regular expressions in ANSI C. man regex.h does not provide that much help.
5 Answers
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How is it possible to declare nothing inside main() in C++ and yet have a working application after
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It is most likely implemented as (or a variant of it):
void print_fibs()
{
//implementation
}
int ignore = (print_fibs(), 0);
int main() {}
In this code, the global variable ignore has to be initialized before entering into main() function. Now in order to initializ...
git + LaTeX workflow
...n give. I've found branches to be very helpful to keep track of "different ideas" for the text or for "different states" of the work. The master branch should be your main body of work, in its most current "ready to publish" state i.e., if of all the branches, if there is one that you are willing to...
In-place edits with sed on OS X
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You can use the -i flag correctly by providing it with a suffix to add to the backed-up file. Extending your example:
sed -i.bu 's/oldword/newword/' file1.txt
Will give you two files: one with the name file1.txt that contains the substitution, and one with the n...
How do you Encrypt and Decrypt a PHP String?
...s mistake; as do many cryptography libraries written in PHP.
You should avoid implementing your own cryptography, and instead use a secure library written by and reviewed by cryptography experts.
Update: PHP 7.2 now provides libsodium! For best security, update your systems to use PHP 7.2 or higher...
How to change fontFamily of TextView in Android
So I'd like to change the android:fontFamily in Android but I don't see any pre-defined fonts in Android. How do I select one of the pre-defined ones? I don't really need to define my own TypeFace but all I need is something different from what it shows right now.
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Window vs Page vs UserControl for WPF navigation?
... in my main Window that changes based on user action.
A Page is a page inside your Window. It is mostly used for web-based systems like an XBAP, where you have a single browser window and different pages can be hosted in that window. It can also be used in Navigation Applications like sellmeadog sa...
Why and How to avoid Event Handler memory leaks?
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A way to get around this from the publisher's side is to set the event to null once you're sure that you won't fire it any more. This will implicitly remove all of the subscribers, and can be useful when certain events are only fired during certain stages of the object's ...
SQL Server Script to create a new user
...ember N'db_owner', N'NewAdminName'
END;
GO
Now, Logins are a bit more fluid than I make it seem above. For example, a Login account is automatically created (in most SQL Server installations) for the Windows Administrator account when the database is installed. In most situations, I just use tha...