Facade is similar to class inheritance, right?

Facade is similar to class inheritance, right?

︿ 2019-03-02 17:04:13 0  3  1279

javascript - Category editor retains previous category name

Now there is such a demand. Due to the unreasonable design of the previous classification, it is now necessary to edit the classification and the previous classification name (called the old classification name) is not in the editing classification drop-down list. However, when querying, the old cla...

黄舟 2017-06-30 09:52:43 0  2  1101

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  1084

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  457

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 0  2  710

Is there a class tree?

Is there a class tree?

二哥 2021-02-21 19:08:28 0  1  1250

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  1465

Delete multi-level classification problems

The content taught by the teacher can only delete the category and subcategories, but the subcategories of the subcategories cannot be deleted.

Tranquil Eternal 2019-07-18 21:49:22 0  1  1160

document

Can the teacher send me the document you wrote?

夕目 2019-06-24 15:49:34 0  1  919

Can't classify

Can't classify

放牛的猩猩 2019-05-09 23:56:01 0  0  931

Can't classify

Error selecting category

旧梦ゝ凉人心 2019-01-10 22:05:30 0  0  1003

System interaction - Does nginx have a module that can call system commands?

Recently, I want to use Nginx to make a simple system management interface, which is to call system commands through RPC. Then return the system output (both error and standard output). If you use PHP or Perl, I know you can use their system interactive interface, but I don't want to introduce scrip...

伊谢尔伦 2017-05-16 17:30:12 0  1  781

Does python have a class similar to java Bytebuffer that operates buffers?

Does python have a class with functions similar to Java ByteBuffer? ByteBuffer in Java is a class that stores a buffer. It has several attributes: mark, position, capacity, and limit. Mark marks a certain position in the buffer when it is read. Position is the current reading position. Capacity...

PHP中文网 2017-06-12 09:20:29 0  1  988

javascript - How to stay logged in when system B is opened in system A?

Two business systems are deployed internally. For example, system a is deployed at 10.10.10.10:8088/index.html, and system b is deployed at 20.20.20.20:8088/index.html. The user logs in on a, and there is a link to the subpage of system a. You can open system b in a new tab. How to ensure that you a...

滿天的星座 2017-05-19 10:19:37 0  2  744

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 0  3  1218

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  807

There are multiple products under multiple categories. How to arrange them in a circular manner by category?

I now have two tables, a category table and a product table. There is a field in the product table to record which category it belongs to. Now I want to display multiple categories from top to bottom on one page. Each category displays its information below. After the products are displayed, the nex...

葫芦娃平衡盘 2018-11-08 18:01:20 0  1  1367

ThinkPHP unlimited categories

How to perform unlimited classification based on id and pid

高洛峰 2017-06-05 11:08:01 0  3  719

redis - spring.xml配置好beanA,父类autowired bean,其子类为何获取beanA报null?,

spring.xml配置好bean redisTemplate,父类autowired bean,其子类为何获取bean redisTemplate报null? 子类直接autowired bean redisTemplate 是可以的，注入成功

曾经蜡笔没有小新 2017-04-26 09:02:14 0  0  869