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APIPOST tutorial [Popularization of technical concepts related to network communication]

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Course Introduction：Apipost is an API R&D collaboration platform that integrates API design, API debugging, API documentation, and automated testing. It supports grpc, http, websocket, socketio, and socketjs type interface debugging, and supports privatized deployment. Before formally learning ApiPost, you must understand some related concepts, development models, and professional terminology. Apipost official website: https://www.apipost.cn

Issue 22_Comprehensive actual combat

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Course Introduction：(Consult WeChat: phpcn01) The comprehensive practical course aims to consolidate the learning results of the first two stages, achieve flexible application of front-end and PHP core knowledge points, complete your own projects through practical training, and provide guidance on online implementation. Comprehensive practical key practical courses include: social e-commerce system backend development, product management, payment/order management, customer management, distribution/coupon system design, the entire WeChat/Alipay payment process, Alibaba Cloud/Pagoda operation and maintenance, and project online operation. .....

Issue 22_PHP Programming

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Course Introduction：(Consult WeChat: phpcn01) Starting from scratch, you can solve conventional business logic, operate MySQL with PHP to add, delete, modify, and query, display dynamic website data, master the MVC framework, master the basics of the ThinkPHP6 framework, and learn and flexibly master all knowledge involved in PHP development. point.

Issue 22_Front-end development

Course 8713

Course Introduction：(Consult WeChat: phpcn01) The learning objectives of the front-end development part of the 22nd issue of PHP Chinese website: 1. HTML5/CSS3; 2. JavaScript/ES6; 3. Node basics; 4. Vue3 basics and advanced; 5. Mobile mall/ Website background homepage layout; 6. Automatic calculation of tabs/carousels/shopping carts...

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How to update multiple states in Localstorage object React

So I already have a localStorage hook that retains state, but now I want to update two items in the object which is to add the updated function const{data,setData}=useLocalStorage();constaddWorkExperience=()=>{letadditionJob={. ..data,jobExperience:[...data.jobExperience,{city:""

2023-09-14 11:49:00

Manually copy a MySQL 5.5 database to another computer

The product my company uses uses MySQL5.5 as the backend database. The product automatically installs and configures MySQL during the installation process. The product can be configured to operate in a hot standby redundant configuration. In these cases, perform the same installation process on 2 separate servers and then select redundant mode during the initial configuration of the product. The product handles all the process of copying database data internally and keeping the two databases in sync. MySQL knows about redundancy settings. MySQL is installed identically on both servers, in the same location, and has the same structure. The product doesn't have a very elegant/efficient way

2023-09-05 00:16:59

How does PHP handle the two-dimensional display and submission of colors and sizes in product management?

Dear friends, I recently encountered a problem with the color and size attributes of a product. For example, a product has two colors and three sizes. Product A has a color design [black, white] and a size design [S, M, L]. I want to click on it. The product list comes to the product details page, enter the quantity of each sku ordered, and then save and submit to the database. As shown below, can you give me some ideas? The color and size of each product are not fixed. The color and size information are retrieved from the database and displayed in an untabled header.

2023-06-12 12:01:22

How to conditionally merge two arrays into a two-dimensional array?

I encountered a small problem. The two arrays can be merged so that they can be quickly written into the database, but no matter how they are merged, it is not ideal. I would like to ask. Arrays 1 and 2 are composed of the same key, and the keys are changed to array1 and raary2. Can you please help, thank you //Array 1 $arry1=array ( [0] => 1-ASD [1] =>&n

2023-02-26 10:20:56

MySQL deduplication, why can only a few hundred or dozens of duplicate data be removed each time, when there are obviously hundreds of thousands of duplicate data?

Requirement: Delete the items with the same primaryid and drugname in DRUG, and keep the smallest row of drug_seq. Question: MySQL uses these methods to remove duplicates. Why can it only remove hundreds or dozens of duplicate data each time? It is like squeezing out toothpaste. Execute it and remove the duplicates. There are obviously hundreds of thousands of duplicate data. I have tried several methods, but the duplicates are still incomplete. #Method 1: DELETE FROM `drug2022` WHERE drug_seq IN( SELECT drug_seq FR

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How to retain two decimal places in c++

Course Introduction：The way to preserve two decimal places in C++ is to specify fixed-point notation using the stream operator fixed. Use setprecision(2) to specify 2 decimal places.

2024-04-26 comment 409

How to retain decimal places in Python

Course Introduction：How to retain the number of decimal places in python: first create a new py file and enter [a=('%.2f' % a)] to retain 2 decimal places; then if you enter [a=('%.4f' % a)] , just keep 4 decimal places; finally, you can also enter [a=format(a, '.2f')] to keep the number of decimal places.

2021-03-02 comment 0 49969

golang怎么保留两位小数

Course Introduction：在 Go 中保留两位小数的方法：使用 strconv.ParseFloat() 将字符串转换为浮点数。使用 fmt.Sprintf() 函数和 %.2f 格式化说明符保留两位小数。

2024-06-06 comment 962

python怎么保留一位小数

Course Introduction：要使用 Python 保留一位小数，可以使用 round() 函数：number：要四舍五入的数字ndigits：保留的小数位数（正数保留小数位，负数四舍五入到最接近的 10 的 ndigits 次方，0 四舍五入到整数）

2024-06-01 comment 0 952

How to keep two decimal places in java

Course Introduction：Methods to retain two decimal places in java: 1. Use DecimalFormat; 2. Use the String.format method.

2023-08-02 comment 0 6355

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