Static Method implementation in VB.NET

A VB.NET module is a static class. The compiler handles this for you. Every method and property on it is static (Shared). A class with a static (Shared) member on it is exactly that: a class with a static (Shared) member. You don’t have to create an instance of it to access the static (Shared) … Read more

Are final static variables thread safe in Java?

the reference to sharedData which is final is thread safe since it can never be changed. The contents of the Map is NOT thread safe because it needs to be either wrapped with preferably a Guava ImmutableMap implementation or java.util.Collections.unmodifiableMap() or use one of the Map implementations in the java.util.concurrent package. Only if you do … Read more

Performance of using static methods vs instantiating the class containing the methods

From here, a static call is 4 to 5 times faster than constructing an instance every time you call an instance method. However, we’re still only talking about tens of nanoseconds per call, so you’re unlikely to notice any benefit unless you have really tight loops calling a method millions of times, and you could … Read more

Django cannot find static files. Need a second pair of eyes, I’m going crazy

do the following: If you are in DEBUG, set STATICFILES_DIRS = (“path/to/static”) variable in your settings.py. It should then work only in DEBUG mode. If you want it to also work in deploy mode, set STATIC_ROOT = (“path/to/static_root”) variable in the settings.py. Then, execute python manage.py collectstatic and it should also work. And now, for … Read more

How do you Require Login for Media Files in Django

It seems to me that the method you outlined in your code should work. It’s really no different than any other protected resource: your views can serve files from disks, records from databases, rendered templates or anything. Just as the login_required decorator prevents unauthorized access to other views, it will prevent such access to your … Read more

Why aren’t static data members allowed in local classes?

From the standard section 9.4.2: If a static data member is of const integral or const enumeration type, its declaration in the class definition can specify a constant-initializer which shall be an integral constant expression. In that case, the member can appear in integral constant expressions within its scope. The member shall still be defined … Read more

When would I use const volatile, register volatile, static volatile in C++?

register volatile int T=10; volatile qualifier means that the compiler cannot apply optimizations or reorder access to T, While register is a hint to the compiler that T will be heavily used. If address of T is taken, the hint is simply ignored by the compiler. Note that register is deprecated but still used. Practical … Read more

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