To achieve Uber.doMagic(context), you can write an extension to the companion object of Uber (the companion object declaration is required): class Uber { companion object {} } fun Uber.Companion.doMagic(context: Context) { }
The problem is that C++ is lacking a self keyword. I typically write: struct Foo { typedef Foo self; static void bar() { self* ptr = nullptr; } }; I realise you still have to make sure the typedef is correct, but at least this way you can have it at the top of the … Read more
try this code : your broadcastreceiver class for internet lost class : public class InternetLostReceiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { context.sendBroadcast(new Intent(“INTERNET_LOST”)); } } in your activity add this for calling broadcast: public class TestActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); registerReceiver(broadcastReceiver, new IntentFilter(“INTERNET_LOST”)); } BroadcastReceiver … Read more
I use a singleton with a member for registration, basically: template< typename KeyType, typename ProductCreatorType > class Factory { typedef boost::unordered_map< KeyType, ProductCreatorType > CreatorMap; … }; Using Loki I then have something along these lines: typedef Loki::SingletonHolder< Factory< StringHash, boost::function< boost::shared_ptr< SomeBase >( const SomeSource& ) > >, Loki::CreateStatic > SomeFactory; Registration is usually … Read more
No, there is no language support for this in C#. There are two workarounds that I can think of immediately: use reflection at runtime; crossed fingers and hope… use a singleton / default-instance / similar to implement an interface that declares the methods (update) Actually, as long as you have unit-testing, the first option isn’t … Read more
This is not how staticmethod is supposed to be used. staticmethod objects are descriptors that return the wrapped object, so they only work when accessed as classname.staticmethodname. Example class A(object): @staticmethod def f(): pass print A.f print A.__dict__[“f”] prints <function f at 0x8af45dc> <staticmethod object at 0x8aa6a94> Inside the scope of A, you would always … Read more
You can dynamically add a classmethod to a class by simple assignment to the class object or by setattr on the class object. Here I’m using the python convention that classes start with capital letters to reduce confusion: # define a class object (your class may be more complicated than this…) class A(object): pass # … Read more
This is the correct way public static function userNameAvailibility() { $result = self::getsomthin(); } Use self:: instead of $this-> for static methods. See: PHP Static Methods Tutorial for more info 🙂
update for python version >= 3.10: staticmethod functions can be called from within class scope just fine (for more info see: python issue tracker, or “what’s new”, or here) for python version <= 3.9 continue reading staticmethod objects apparently have a __func__ attribute storing the original raw function (makes sense that they had to). So … Read more
The most straightforward way to think about it is to think in terms of what type of object the method needs in order to do its work. If your method needs access to an instance, make it a regular method. If it needs access to the class, make it a classmethod. If it doesn’t need … Read more