#class method

In Java, static keyword is used for memory management mainly. Static elements below to the class. It can apply with:

Static Variable (also known as a class variable)

Static Method (also known as a class method)

Static Block

Static Nested class

Static Import

Note: These static variables and method access by class name it doesn’t require any class instance.

Java Static Variable

A variable declares…

In Java, static keyword is used for memory management mainly. Static elements below to the class. It can apply with:

Static Variable (also known as a class variable)

Static Method (also known as a class method)

Static Block

Static Nested class

Static Import

Note: These static variables and method access by class name it doesn’t require any class instance.

Java Static Variable

A variable declares…

How to distinguish an instance method, a class method, a static method or a function in Python 3?

I want to distinguish between methods and functions in Python 3. Furthermore, I want to get the corresponding class if it is a method. My current solution is like this:

import types import inspect def function_or_method(f): if inspect.ismethod(f): if inspect.isclass(f.__self__): print("class method") klass = f.__self__ else: print("instance method") klass = f.__self__.__class__ elif…

method type identifier로 +를 사용하는 class method는 java에서의 static method와 비슷함. identifier로 -를 사용하는 instance method는 흔히 생각하는 method.

쉽게 생각해서 class method는 구현된 메소드를 다른 클래스에서 사용하기 위해 해당 메소드가 구현된 클래스의 객체를 생성할 필요가 없는 것이고 instance method는 일반적인 메소드와 마찬가지로 해당 메소드의 클래스의 객체를 생성해야 접근할 수 있음.

Instance methods are called on the. . . wait for it. . . instance of a class, while class methods are called on the class itself.  For example:

>>> class Demo

>>>   def method_1

>>>     puts "instance method!"

>>>   end

>>>    def self.method_1

>>>      puts "class method!"  # can also be written as Demo.method_1

>>>   end

>>> end

>>> Demo.new.method_1

=> "instance method!"

>>> Demo.method_1

Objective-C:

Instance methods use an instance of a class, whereas a class method can be used with just the class name. In Objective-C they are defined thusly:

@interface MyClass : NSObject

+ (void)aClassMethod;

- (void)anInstanceMethod;

@end

They could then be used like so:

[MyClass aClassMethod];

MyClass *object = [[MyClass alloc] init];

[object anInstanceMethod];

Some real world examples of class methods are the convenience methods on many Foundation classes like NSString's +stringWithFormat: or NSArray's +arrayWithArray:. An instance method would be NSArray's -count method.

C#:

In C# a class method is marked static. Methods and properties not marked static are instance methods.

class Foo {

  public static void ClassMethod() { ... }

  public void InstanceMethod() { ... }