Common design patterns in java

Recently I want to study design patterns, but there are quite a few design patterns. I would like to ask what are the commonly used design patterns?

仅有的幸福 2017-05-27 17:41:16 0  8  945

When placing orders in the mall, do you design one table or two tables?

When placing orders in the mall, do you design one table or two tables? For example: Should we design wp_order and wp_order_goods tables, or only one wp_order_goods table?

骄阳似火 2020-08-21 09:28:09 0  0  1259

javascript - css design patterns

I would like to ask the master, what are the commonly used design patterns in CSS design, and what are the characteristics of each?

伊谢尔伦 2017-05-19 10:26:45 0  9  654

Product specification sheet design

I would like to ask the masters: I want to design a product-related table now, which involves multiple specifications and multi-specification values. How should I design the table and how many tables should I have?

A峰 2019-12-06 18:34:33 0  2  1484

Tailwind CSS: Crafting Navigation Design

I'm new to CSS and VueJs so I'm creating a tab panel design + functionality Currently I'm using the tailwindCSS plugin The design I want is like this: Current: CodePen I can't replicate this wish because I'm missing the : between elements of spaces: I tried using flexspace-x-10 or gridgrid-gap-20 bu...

P粉515066518 2024-02-26 16:48:59 0  1  393

programming architecture

Can I ask you a question? I was writing a project recently, and my master asked me to write the programming architecture first, and then determine the implementation of the back-end code. I don’t know how to start. There is also what architecture specifically refers to. I found some information abou...

太阳 2020-08-10 22:59:42 0  0  934

After installing phpstudy normally, setting up the website, and installing shopex, garbled characters appeared.

I installed phpstudy normally, set up the website, and installed shopex, but garbled characters appeared. Later, when I changed to the default directory, the whole page was also garbled. http://localhost/shopex/install/ I don’t know why?

张远洲*** 2020-03-18 22:44:02 0  0  1460

python - Problems with personal blog database design

I need to design a personal blog and have encountered difficulties in database design. The function I want to implement is: ordinary users can only comment on blogs. The administrator (that's me) can log in, post blogs, and reply to comments. The original design was for tables with User, Admin, Post...

typecho 2017-06-28 09:23:13 0  3  882

php - E-commerce website database design

How to design the e-commerce website database? Are there any good templates?

高洛峰 2017-07-05 09:58:23 0  5  1635

linux - php queue, how to design scheduled tasks?

PHP queue, how to design scheduled tasks?

世界只因有你 2017-06-23 09:11:37 0  4  962

mysql - database table structure design

Describe the requirements: Now we need to design the database table structure. There are many types of rules. How to design tables to store these rules. Each rule has common attributes and different attributes. Currently, I think of two methods: the first is through foreign keys (common attributes o...

習慣沉默 2017-06-30 09:55:23 0  3  1081

php - Questions about data table design?

You need to design a table to store images, including the path to upload the image, and the description. Each icon has two images, one style before clicking and one style after clicking. How to design fields elegantly? Please give me some advice, thank you!

大家讲道理 2017-06-08 11:01:51 0  1  616

Global installation and local installation

After glup is installed globally, why do I still need to install glup locally when developing projects? How to check whether glup is installed globally? What is the difference between glup global installation and local installation?

张莹 2019-03-28 10:45:59 0  0  1129

Mysql database design - chat record table design

I would like to ask all the experts, how do you design the chat database? Those who have experience can talk about their experience, and those who have no experience can discuss it together. The problems encountered so far: Assume that there are 1,000 people in the group chat, and user a sends a mes...

M࿆r.࿆z࿆h࿆a࿆n࿆g࿆ 2020-04-21 12:12:14 0  2  1687

mysql - table design with multiple roles having different fields

I design a system with multiple roles and they have different fields. Should I design different role tables, or extract a basic information table? Suppose I extract a basic information table, and I want to design permissions, so I make a role table and use the user role table to associate it. Then t...

滿天的星座 2017-05-19 10:07:01 0  2  792

How to create a satisfying web design

It cannot display my own designs. I want to create a redesign. Creating a web design is a multifaceted process that requires aesthetics, functionality, and user experience to be seamlessly blended together. It starts with a deep understanding of the website’s purpose, target audience, and brand. A w...

P粉908643611 2023-08-10 17:09:33 0  1  561

A brief discussion on the design and ideas of workflow engine data tables

We all know that workflow engines play a decisive role in system development, so how to design your own workflow engine well? Today we will simply talk about flow engine design from the perspective of database design. Next, we will talk to you about the database design of Tpflow workflow engine. Wor...

蝈蝈 2019-02-18 18:36:01 0  0  1284

How to design the coupon database table of the mall?

How to design the coupon database table of the mall?

黄埔竹下 2018-04-27 13:31:56 0  0  3774

mysql - Database design (scheme design), should NULL be avoided as much as possible?

I learned the actual phenomenon: NULL has unclear semantics and is not easy to optimize when querying. If it represents a null value, there can be other alternatives (logically) VARCHAR(100) NOT NULL DEFAULT ''; INT NOT NULL DEFAULT 0; I hope you can understand the expected phenomenon. When designin...

仅有的幸福 2017-05-18 10:54:25 0  2  742