c# - "A class can directly inherit multiple interfaces, but can only directly inherit one class (including abstract classes)." Isn't it inconsistent with C++'s multiple inheritance?

"A class can directly inherit multiple interfaces, but can only directly inherit one class (including abstract classes)." Isn't it inconsistent with multiple inheritance in C++?

ringa_lee 2017-05-31 10:36:49 0  2  2279

javascript - Add a pseudo-class to a certain class. This class has a click event. Now when I click on the pseudo-class, the click event is also triggered.

Add a pseudo-class to a certain class. This class has a click event. Now when I click on the pseudo-class, the click event is also triggered. How can I prevent the click event from being triggered by clicking on the pseudo-class?

欧阳克 2017-07-05 10:44:13 0  2  1053

$this in PHP class

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

A _ Ｑ _ｉ_ 2021-10-10 19:59:11 0  5  887

Extend PHP classes used internally without changing dependencies

I want to override a PHP class in Laravel, but it is being extended by several other classes that I don't want to bother with. The overall structure is as follows classAextendsR{}classBextendsR{}classCextendsR{}classDextendsR{}where A/B/C/D/R are all classes in the external package. I want to extend...

P粉278379495 2024-01-10 17:24:16 0  1  390

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 0  0  710

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 0  3  1443

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 0  1  885

Serious problem: Unable to find 'PHPMailer' class

I tried: include_once('C:\Inetpub\wwwroot\php\PHPMailer\PHPMailerAutoload.php'); Fatal error: 'PHPMailer' not found on line 151 of C:\Inetpub\wwwroot\php\index.php Class I put PHPMailerAutoload.php in the same directory as my script. Can anyone help me solve this problem?

P粉738346380 2023-08-20 20:15:59 0  1  554

class variables in python

Are variables in classes the same as self.var1 in functions? Why are they the same? {Code...} After the function is run, {Code...} Why is the class variable var1 self.var1? What is the reason?

phpcn_u1582 2017-06-28 09:24:34 0  1  783

Convert base class instance to derived class without typecasting in typescript

I extended a new class from the base class and added some properties. How to create an instance of a derived class using a given base class (including attached properties)? This code works but casts the class type and is not type safe. How can I do this without type casting? //Baseclassisimportedfro...

P粉451614834 2024-02-25 19:48:09 0  2  432

PHP class attribute declaration?

<?php class Image{     private $path;     public function __construct($path = './'){      &nb

A _ Ｑ _ｉ_ 2021-10-17 22:05:54 0  7  886

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 0  0  963

Homework for this class. . .

When will the submitted homework for this class be reviewed?

李铁蛋 2018-10-21 12:00:09 0  1  993

class shared variable problem

For example, I have a class that has a static global variable a; it can also be non-static and then there is 1.php to assign the value of a to the class variable a to 88888; there is also 2.php how to get the variable of class a; Three different files, class, 1.php, 2.php

脾气超好 2019-09-03 23:33:27 0  1  1196

Fatal error occurs in the test database: Class 'think\Controller' not found in C:\php\WWW\t\application\admins\controller\Test.php on line 8

Fatal error: Class 'think\Controller' not found in C:\php\WWW\t\application\admins\controller\Test.php on line 8 There is no foundation at all... the PHP integrated environment used

有宏陆 2019-06-17 17:24:09 0  2  1840

javascript - Confusion about class and super in ES6

{Code...} After reading Ruan Yifeng's ES6 tutorial, I am still a little confused about class and super. First, create a Book class and then create a subclass Book to inherit the parent class Book. Super calls the constructor of the parent class and calls it in toSay. The getName() method of the pare...

黄舟 2017-05-19 10:31:04 0  2  763

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 0  1  784

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 0  1  1040

Bind custom method parameters to class attributes

Is there a way to bind a class attribute to a method parameter within the class so that a two-way link is established on Ctrl+click? class Attachment extends Repository { public $documents; public function fromDocuments(callable $scope) { $this->scopeOnRepoProperty($scope, 'doc'

P粉364642019 2023-07-28 17:29:03 0  1  546

Design a user class USER. The variables in the class include user name, password and variables that record the number of users. Define class constructors, getters, and setters

Design a user class USER. The variables in the class include username, password and variables that record the number of users. Define the constructor method of the class, the methods for getting and setting passwords, and the methods for displaying user information.

李雅琦 2020-12-21 15:09:28 0  1  1990