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Check if an apt-get package is installed and then install it if it's not on Linux
...s, too.
dpkg-query -l <packagename>
To find what package owns the command, try:
dpkg -S `which <command>`
For further details, see article Find out if package is installed in Linux and dpkg cheat sheet.
sha...
Does “\d” in regex mean a digit?
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.bashrc at ssh login
... this should work on any sane distro with Bash, thus all these comments are obsolete :)
– user529649
Jul 2 '12 at 2:09
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What is the MIME type for Markdown?
...fore March 2016, when RFC7763 was still a draft.
There is no official recommendation on Gruber’s definition, but the topic was discussed quite heavily on the official mailing-list, and reached the choice of text/x-markdown.
This conclusion was challenged later, has been confirmed and can be, I...
How to escape quote marks in Exec Command in MSBuild
...&quot; to encode the double quotes that you want net to see inside the Command attribute value :
<Exec Command="net use x: &quot;\\ofmapoly703\c$\program files\ar\iap&quot; /user:$(UserID) $(Password)"
WorkingDirectory="c:\"
ContinueOnError="false"
/>
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How to get Linux console window width in Python
...columns = os.popen('stty size', 'r').read().split()
uses the 'stty size' command which according to a thread on the python mailing list is reasonably universal on linux. It opens the 'stty size' command as a file, 'reads' from it, and uses a simple string split to separate the coordinates.
Unlike...
How to get Core Data object from specific Object ID?
...nagedObjectContext. If anyone knows what this method is useful for, please comment.)
[eta.: Another important difference between the first method and the other two is that existingObjectWithID:error: never returns a fault; it always fetches the whole object for you. If you're trying to avoid that (...
Retrieve column names from java.sql.ResultSet
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Futures vs. Promises
...out << future.get();
});
producer.join();
consumer.join();
One (incomplete) way to implement std::async using std::promise could be:
template<typename F>
auto async(F&& func) -> std::future<decltype(func())>
{
typedef decltype(func()) result_type;
auto promi...
Resize image to full width and fixed height with Picasso
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