static-methods – Page 3

Calling a Activity method from BroadcastReceiver in Android

August 12, 2023 by Tarik

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

What is the difference between static methods in a Non static class and static methods in a static class?

August 8, 2023 by Tarik

The only difference is that static methods in a nonstatic class cannot be extension methods. In other words, this is invalid: class Test { static void getCount(this ICollection<int> collection) { return collection.Count; } } whereas this is valid: static class Test { static void getCount(this ICollection<int> collection) { return collection.Count; } }

Using private static methods [duplicate]

August 7, 2023 by Tarik

A private static method by itself does not violate OOP per se, but when you have a lot of these methods on a class that don’t need (and cannot*) access instance fields, you are not programming in an OO way, because “object” implies state + operations on that state defined together. Why are you putting … Read more

In Java, is there any disadvantage to static methods on a class?

August 4, 2023 by Tarik

In my opinion, there are four reasons to avoid static methods in Java. This is not to say that static methods are never applicable, only to say that they should generally be avoided. As others have pointed out, static methods cannot be mocked out in a unit test. If a class is depending on, say, … Read more

Are static methods a DI anti-pattern?

August 1, 2023 by Tarik

Static methods are appropriate for things that don’t have associated state. Some factory methods, “purely functional” methods like Math.sin, and the like are all perfectly acceptable static methods. java.lang.Math and java.util.Collections have many fine examples of perfectly acceptable static methods. Fortunately, these methods have no need for dependency injection, or to interact with such things; … Read more

Is there a way to force a C# class to implement certain static functions?

July 24, 2023 by Tarik

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

Difference between static function and singleton class in swift [closed]

July 23, 2023 by Tarik

Sure this sounds confusing and can be debated. However, from the best practices i can put some suggestions. Singleton is usually used to create a resource intensive and one timer initialisation for instance: a database connector, login handler and such. Utility class are classes that only have static functions and variables. It should not deal … Read more

Is @staticmethod decorator needed for declaring a Static Method in Python?

July 10, 2023 by Tarik

You need the decorator if you intend to try to call the @staticmethod from the instance of the class instead of of the class directly class Foo(): def bar(x): return x + 5 >>> f = Foo() >>> f.bar(4) Traceback (most recent call last): File “<pyshell#7>”, line 1, in <module> f.bar(4) TypeError: bar() takes 1 … Read more

What is the purpose of static methods? How do I know when to use one? [duplicate]

June 25, 2023 by Tarik

See this article for detailed explanation. TL;DR 1.It eliminates the use of self argument. 2.It reduces memory usage because Python doesn’t have to instantiate a bound-method for each object instiantiated: >>>RandomClass().regular_method is RandomClass().regular_method False >>>RandomClass().static_method is RandomClass().static_method True >>>RandomClass.static_method is RandomClass().static_method True 3.It improves code readability, signifying that the method does not depend on state … Read more

static methods and variables in Kotlin?

June 25, 2023 by Tarik

Update: Anyone (like OP) who just needs a so-called “Singleton”, sometimes called “Service” (except in Android), should simply use Kotlin’s built-in: object Foo { // Done, this already does what OP needed, // because the boilerplate codes (like static field and constructor), // are taken care of by Kotlin. } (Like Roman rightly pointed out … Read more