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Is the class identifier the key of the array?

Is the class identifier the key of the array?

齐天大宅 2023-10-04 00:37:56

oop - In Java, doubts about anonymous inner classes calling external class methods

Today I learned about inner classes and learned that inner classes can hold this of outer classes, so that OuterClass.this.medthod() can be used in inner classes to reference the corresponding outer class methods. But I wrote the code and it can run. However, I don't understand the calling logic ver...

漂亮男人 2017-05-17 10:07:37

Table class cannot be recognized/read in html/css

I have a table that is supposed to have a "table-class" class, but the class isn't even recognized/read and the properties don't show up in the table. I'm using azureappServiceEditor and when I run the code the output is just a default stylesheet so the attribute of class="table-class...

P粉727416639 2024-04-02 18:29:23

objective-c - 在一个父类中 self 是其子类的对象.

在一个类的父类中什么情况下 self 可以表示为它的子类的对象?self 不应该是在哪个类中表示那个类的对象吗?

黄舟 2017-05-02 09:18:51

Will calling a static method directly using the class name in PHP trigger the constructor of the class or parent class?

As the title says, PHP calls static methods directly using the class name. Two questions: 1. Will the constructor of the current class be called? 2 Will the constructor of the parent class of the current class be called?

淡淡烟草味 2017-07-07 10:34:10

Problem assigning base class pointer to derived class

Assign the derived class address to the base class pointer, that is, the base class pointer refers to the derived class object, which is what we usually call polymorphism. But when it is the other way around, it must be forced type conversion before it can be compiled. Here is the direct code: {code...

曾经蜡笔没有小新 2017-06-05 11:11:46

How does the parameter $class of the spl_autoload_register(function($class){} callback function identify the class to be loaded?

How does the parameter $class of the spl_autoload_register(function($class){} callback function identify the class to be loaded? Can automatically loaded classes under the same root file be identified by $class?

安超 2023-01-13 22:07:10

How to get users for each category and subcategory in Moodle

I want to get users for each category. I am using moodle3.8 version. Is there any way to get users by categories.

P粉818306280 2024-02-26 13:07:04

Class initialization problem

Initialization of a class means that a class file of the class is generated, right?

P粉477414213 2022-11-19 12:50:45

php - Why does subclass overriding parent class properties and methods not override parent class properties and methods?

1. Since inheritance is passed by reference, why does the subclass rewrite the properties and methods of the parent class not change the properties and methods of the parent class. What does inherited reference transfer mean? Under what circumstances will the member methods and member properties of ...

PHP中文网 2017-05-16 13:11:34

PHP class interface technology (interface)

Interface Technology What is an interface? Look at the "development history" of interfaces: Class --> Abstract class --> Some kind of "structural form" that is more abstract than abstract class: interface; Interface: with

A-王青召 2018-11-14 15:49:57

Regarding the issue of whether subclasses will automatically call the parent class constructor

<?phpheader("content-type:text/html;charset=utf-8");class nn//This code obviously means that its subclass automatically calls the constructor of the parent class. . . . { public $name; public function __construct() { echo 'I am in class nn

帝释天 2019-04-24 22:19:10

abstract class

In the code introducing the abstract class, running shows that AbstractClass is not found. What is going on?

★☆兴☆★ 2020-03-30 14:47:51

Facade is similar to class inheritance, right?

Facade is similar to class inheritance, right?

︿ 2019-03-02 17:04:13

__autoload introduces class files

When using the __autoload method to automatically call class files, is it necessary to instantiate each class file that needs to be imported? ? ? Isn't this similar to require and include? ? ?

还要我怎样 2019-03-06 18:11:35

$this in PHP class

class DBmodel{ private $name; public __construct(){ $this->name = $name; } &

A _ Ｑ _ｉ_ 2021-10-10 19:59:11

java - Anonymous inner classes and inherited classes, why is there a difference when implementing ClassLoader

I was looking at the Java virtual machine recently, and the class loader section gave this example: {Code...} In short, it uses a custom class loader to load a class, and the returned class is the same as the class loaded by the SystemClassLoader that comes with the jvm. different. So if you use a c...

PHP中文网 2017-05-17 10:07:45

java - abstract inner class + generics

Simple inner class usage: {code...} Add generics to the above example {code...} Call the inner class in the test method and compile correctly. An error is reported in the main method, which cannot be referenced from a static context. If you call an internal class in another newly created class, no e...

给我你的怀抱 2017-05-17 10:00:28

What is the definition of class

What is the definition of class

风车车 2020-04-01 19:16:05

Automatically generate class libraries

How to automatically generate a class library without using the command line

大司命 2018-08-07 17:11:45