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How can I return NULL from a generic method in C#?
...that if you're using this generic method to say, convert a Database object from DbNull to Int and it returns default(T) where T is an int, it'll return 0. If this number is actually meaningful, then you'd be passing around bad data in cases where that field was null. Or a better example would be a D...
Python: Best way to add to sys.path relative to the current running script
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what if the script being runned from a different directory? for example from root directory by giving the full system path? then os.getcwd() will return "/"
– obayhan
Oct 12 '19 at 12:14
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Deploying my application at the root in Tomcat
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You have a couple of options:
Remove the out-of-the-box ROOT/ directory from tomcat and rename your war file to ROOT.war before deploying it.
Deploy your war as (from your example) war_name.war and configure the context root in conf/server.xml to use your war file :
<Context path="" docBase="...
Extract traceback info from an exception object
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Yes, it is meant to be used. From What’s New In Python 3.0 "PEP 3134: Exception objects now store their traceback as the traceback attribute. This means that an exception object now contains all the information pertaining to an exception, and there ar...
Difference between malloc and calloc?
...t calloc implementations under mainstream OSes will get known-zeroed pages from the OS (e.g. via POSIX mmap(MAP_ANONYMOUS) or Windows VirtualAlloc) so it doesn't need to write them in user-space. This is how normal malloc gets more pages from the OS as well; calloc just takes advantage of the OS's ...
How to access the local Django webserver from outside world
...it using python manage.py runserver . If I access 127.0.0.1:port locally from the webserver, I get the Django page indicating it worked.
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Copy folder structure (without files) from one location to another
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Best answer from me with find. Else you can try rsync solution from Chen Levy answer in this SO question
– Mat M
May 14 '14 at 13:14
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Can I mix MySQL APIs in PHP?
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You can't mix any of the three (mysql_*, mysqli_*, PDO) MYSQL API's from PHP together, it just doesn't work. It's even in the manual FAQ:
It is not possible to mix the extensions. So, for example, passing a mysqli connection to PDO_MySQL or ext/mysql will not work.
You need to use the...
How to use executables from a package installed locally in node_modules?
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You don't have to manipulate $PATH anymore!
From npm@5.2.0, npm ships with npx package which lets you run commands from a local node_modules/.bin or from a central cache.
Simply run:
$ npx [options] <command>[@version] [command-arg]...
By default, npx will ch...
What is this date format? 2011-08-12T20:17:46.384Z
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The T is just a literal to separate the date from the time, and the Z means "zero hour offset" also known as "Zulu time" (UTC). If your strings always have a "Z" you can use:
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US)...