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Get all inherited classes of an abstract class [duplicate]
... you'd think.
You need to use Assembly.GetAssembly(typeof(T)) because your base class might be in a different assembly.
You need to use the criteria type.IsClass and !type.IsAbstract because it'll throw an exception if you try to instantiate an interface or abstract class.
I like forcing the enumer...
DESTDIR and PREFIX of make
...
For what it's worth, in a cmake-based build you can emulate "case 4" (for stow, etc) by running cmake -DCMAKE_INSTALL_PREFIX=/foo/bar/baz -P cmake_install.cmake in the build directory.
– Ryan Pavlik
Sep 6 '12 at 17:12
...
Providing a default value for an Optional in Swift?
... the type contained in the Optional. As it stands, type inferencing sets T based on the parameter given to getOrElse, and then fails at runtime if this does not match the Optional and the Optional is non-nil:
let x: Int?
let y = x.getOrElse(1.414) // y inferred as Double, assigned 1.414
let a: In...
Contributing to project on github, how to “rebase my pull request on top of master”
...like with a git pull, prior to rebasing onto master, or more simply just rebase onto upstream/master.
I.e:
git checkout master
git pull upstream master
git checkout feature
git rebase master
or
git checkout feature
git rebase upstream/master
Update:
After fixing your local feature branch, yo...
How to add multiple objects to ManyToMany relationship at once in Django ?
Based on the Django doc, I should be able to pass multiple objects at once to be added to a manytomany relationship but I get a
...
Methods inside enum in C#
...ployeeType() { }
private EmployeeType(int value, string displayName) : base(value, displayName) { }
// Your method...
public override string ToString()
{
return $"{value} - {displayName}!";
}
}
Then you can use it like an enum, with the possibility to put methods insid...
What browsers support HTML5 WebSocket API?
...ywebsockets
websockify
gevent-websocket, gevent-socketio and flask-sockets based on the former
Autobahn
Tornado
In C:
libwebsockets
In Node.js:
Socket.io : Socket.io also has serverside ports for Python, Java, Google GO, Rack
sockjs : sockjs also has serverside ports for Python, Java, Erlang...
I want my android application to be only run in portrait mode?
...
@EduardoCoelho you can actually make a base class PortraitActivity and in onCreate call setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) All activities extending this won't rotate
– Twinone
Jun 6 '14 at 9:07
...
Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...e autocompletion, the looking up of definitions, navigation of source code base or the previewing of doc-strings.
5 Answers...
Right query to get the current number of connections in a PostgreSQL DB
...rsion of the first one would be:
SELECT sum(numbackends) FROM pg_stat_database;
In that case, I would expect that version to be slightly faster than the second one, simply because it has fewer rows to count. But you are not likely going to be able to measure a difference.
Both queries are based ...