One Demo handles the front-end and back-end multi-part uploading of large files, resumed uploading at breakpoints, and instantaneous uploading.

1Foreword File uploading is very common in project development. Most projects will involve the uploading of pictures, audios, videos, and files. Usually a simple Form can upload small files, but when encountering large files, such as more than 1GB, or When the user’s network is relatively slow, simple file upload is not applicable. The user […]

1034 Head of a Gang (30 points)

Title translation: Given N call records and a limit K. Each call record contains two names and a call time, and the people contacted belong to the same gang. The question requires that only a group with more than 2 people and a total call time exceeding K can be counted as a gang, and […]

Use of Vue Zhongtian map to add points, lines, areas, convergence points, information windows, customized right-click menus, and switch map layer operations

The collection encapsulates several commonly used sky map methods for your own subsequent use and for everyone to directly CV. The comments are very detailed and can be used out of the box or copied. Add a single point marker Information window Information window parameters + click callback Add multiple point markers Add point aggregation […]

One Demo handles the front-end and back-end multi-part uploading of large files, resumed uploading at breakpoints, and instant uploading.

1Foreword File uploading is very common in project development. Most projects will involve the uploading of pictures, audios, videos, and files. Usually a simple Form can upload small files, but when encountering large files, such as more than 1GB, or When the user’s network is relatively slow, simple file upload is not applicable. The user […]

LINUX Talk (Spend 10 minutes to learn blind box knowledge points) (perror, O_CREAT|O_RDWR, S_IRWXU, lseek, dup, system, struct stat statbuf, regular file bits)

ok friends, without further ado, let’s take a look at the code below! First question: if(fd1< 0) { perror(“open :”); printf(“errno is:%d \ “,errno); This code is used to handle the situation where the file fails to open: The open() function will return a non-negative file descriptor when the file is successfully opened, and -1 […]

Qt opengl draws points, lines, triangles, polygons (2)

Article directory 1. Related macro definition parameters 2. Code and example diagrams 1. Point LG_POINTS 0x0000 2. Line GL_LINES 0x0001 3. Line GL_LINE_LOOP 0x0002 4. GL_LINE_STRIP 0x0003 5. GL_TRIANGLES 0x0004 6. GL_TRIANGLE_STRIP 0x0005 7. GL_TRIANGLE_FAN 0x0006 8. GL_QUADS 0x0007 9. GL_QUAD_STRIP 0x0008 10. GL_POLYGON 0x0009 Summarize 1. Related macro definition parameters #define GL_POINTS 0x0000 // […]

Several ways to report front-end buried points

Recommend a practical interview question bank to everyone 1. Front-end interview question bank (Essential for interviews) Recommended: Address: Web front-end interview question bank Introduction In modern web applications, point reporting is an important means of data collection and analysis. This article will introduce several common ways to report front-end buried points, and elaborate on how […]

Guide to the <head> element in HTML: Detailed analysis of key knowledge points and best practices to help you optimize the head of your web page!

Recommended minimum value The following are the basic elements of any web document (website/application): <meta charset=”utf-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1″> <!– The above 2 meta tags *must* come first in the <head> to consistently ensure proper document rendering. Any other head element should come *after* these tags. –> <title>Page Title</title> meta charset– defines the encoding […]

Comprehensive article on the most comprehensive knowledge key points in the history of Python (super detailed version)

Internet knowledge What is HTTPS? The project’s secure HTTP protocol, https requires a cs certificate, data encryption, port 443, safe, the same website will have a higher https seo ranking Common response status codes Idempotence and security of http request methods -WSGI RPC CDN SSL (Secure Sockets Layer), and its successor Transport Layer Security (TLS), […]