Found a total of 10000 related content
HTML `meta name='author'` and `meta name='generator'`
Article Introduction：Tags are used to indicate the author of the web page, which facilitates team collaboration or content attribution, such as; tags indicate web page generation tools or frameworks, such as, which facilitate technical identification and statistical analysis, but may involve security risks. Suggestions for use include: 1. Team project or corporate website can add author information; 2. Personal website can enhance the sense of belonging; 3. Team name can be replaced when privacy is sensitive; 4. Generator tags should be paid attention to avoid redundancy and can be closed; 5. Keep the content concise and unified format. Both are not required for SEO, but have some value for management and tracking.
2025-07-17
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464
What are some popular third-party Python libraries (e.g., NumPy, pandas, matplotlib, requests, Django, Flask)?
Article Introduction：Python's third-party library ecosystem is powerful and diverse, with cores including: 1. NumPy and Pandas are used for data processing and analysis, NumPy supports multi-dimensional array and matrix operations, Pandas provides DataFrame structure to simplify structured data operations; 2. Matplotlib and Seaborn are used for data visualization, the former is a basic drawing tool, and the latter provides more advanced statistical charts based on this; 3. Django and Flask are used for web development, Django functions are fully suitable for large applications, Flask is lightweight and flexible for small services or APIs; 4. Requests are used for HTTP requests, and handle network data interactions concisely and efficiently. These libraries each perform their own
2025-06-30
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227
Free market web version Official entrance to market website
Article Introduction：The free market web version can be accessed through the official websites of Binance, Ouyi, Huobi and Sesame. 1. Open the browser and enter the corresponding URL (such as www.binance.com). 2. Click the "Market" option in the top menu of the home page. 3. Select the trading pair you are interested in and view the detailed market data. These platforms provide real-time data, chart analysis and market information, and are user-friendly.
2025-06-04
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350
Working with HTML5 Web Workers for Background Tasks
Article Introduction：Using WebWorkers can improve web page performance. The considerations include: 1. Worker cannot access DOM; 2. Communication needs to be through postMessage and onmessage; 3. Scripts must be homologous; 4. Suitable for handling high CPU occupancy tasks such as encryption, data analysis, audio and video processing; 5. Avoid transmission of big data, and can be processed by ArrayBuffer or blocks; 6. It is necessary to manually manage the life cycle and destroy it in time to prevent memory leakage.
2025-07-08
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893
HTML Microformats for Semantic Data
Article Introduction：Microformats is a semantic tagging method based on HTML, adding structured data to web page content through a predefined class name. It uses class names such as h-card and h-event to mark information such as characters and events, and uses prefixes such as p-, u-, dt-, etc. to represent data types such as text, links, time, etc., which is convenient for machine analysis. Its advantage is that it does not require additional technology, is good compatibility and is easy to maintain.
2025-07-18
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303
What are Web Workers and why are they useful for performance?
Article Introduction：WebWorker is a multi-threaded mechanism provided by the browser to improve web page performance. 1. It avoids page freezing by moving time-consuming tasks out of the main thread; 2. Improves response speed and makes the main thread focus on UI interaction; 3. Use multi-core CPU to process tasks in parallel. Suitable scenarios include data analysis, encryption operations, game AI, audio and video processing and timing tasks. When using it, be careful not to operate the DOM directly, the communication has performance costs, complex debugging and compatibility issues.
2025-06-30
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640
Chrome using too much disk space
Article Introduction：Chrome can solve the problem of most disk space: 1. Clear the browser cache and browsing data, enter the settings and select to clear cookies, website data and cache files for all time; 2. Manage extensions, uninstall infrequently used plug-ins and check their local data usage; 3. Turn off the preload function, disable predictive services and preload web page options in privacy settings; 4. Check the user data directory size, use disk analysis tools to locate large files and process them, and back up or reinstall the browser if necessary. Regular maintenance helps free up space, especially for devices with smaller storage capacity.
2025-07-12
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How can you measure web performance using browser APIs like the Navigation Timing API?
Article Introduction：Web performance is important because users expect a quick response experience. 1.NavigationTiming API provides time stamps for each stage of page loading, such as DNS lookup, DOM loading, etc.; 2. Obtain key indicators by calculating the time difference, such as page loading time, DOM ready time, and server waiting time; 3. You can record these data with scripts and integrate them into analysis tools; 4. Other APIs such as PerformanceObserver, ResourceTiming, and LongTasks can deeply analyze performance bottlenecks; 5. It is recommended to start tracking from basic indicators and optimize user experience with resource loading information.
2025-07-06
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846
MySQL Cost-Based Optimizer and Index Selection
Article Introduction：The core basis for the MySQL query optimizer to select indexes is the cost-based cost model (CBO), which determines the optimal solution by evaluating the cost of different execution paths. 1. The optimizer will consider factors such as scanning row count, reading page count, whether to return to table, whether to use sorting or temporary tables. 2. Common reasons for the unselected index include: uneven data distribution or inaccurate statistical information, resulting in incorrect cardinality estimation; the cost of backing the table is too high, and the optimizer believes that full table scanning is more efficient; query writing makes the index invalid, such as using functions, leading fuzzy matching, or some of the no index in the OR condition. 3. It is recommended to run ANALYZETABLE regularly, avoid indexing in low-dividing fields, create coverage indexes to reduce back to tables, write SQL reasonably and use EXPLAIN analysis.
2025-07-31
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848
Python web scraping dynamic content
Article Introduction：Dynamic web crawling can be achieved through an analysis interface or a simulated browser. 1. Use browser developer tools to view XHR/Fetch requests in the Network, find the interface that returns JSON data, and use requests to get it; 2. If the page is rendered by the front-end framework and has no independent interface, you can start the browser with Selenium and wait for the elements to be loaded and extracted; 3. In the face of the anti-crawling mechanism, headers should be added, frequency control, proxy IP should be used, and verification codes or JS rendering detection should be carried out according to the situation. Mastering these methods can effectively deal with most dynamic web crawling scenarios.
2025-07-10
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453
Implementing A/B Testing in Frontend Development
Article Introduction：A/B testing is effective in front-end development because it is based on data-driven decision-making, by comparing different versions of a web page or application interface, to determine which version performs better. To successfully implement A/B tests, you need to follow the following steps: first set clear goals, such as increasing click-through rate, extending session time or increasing conversion rate, and ensuring that the goals are consistent with the business goals; secondly, choose tools suitable for the technology stack, such as third-party platforms such as Optimizely or custom solutions such as LaunchDarkly; then implement variants in a modular way to avoid destroying the UI and ensuring the stability of the variant during the user's session; finally, continuously monitor the results, judge the test stop time based on statistical significance, and avoid misjudging the effectiveness due to external factors.
2025-07-18
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1031
Dave The Diver: How To Catch Spider Crabs
Article Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w
2025-01-10
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868
Prepare for Interview Like a Pro with Interview Questions CLI
Article Introduction：Prepare for Interview Like a Pro with Interview Questions CLI
What is the Interview Questions CLI?
The Interview Questions CLI is a command-line tool designed for JavaScript learners and developers who want to enhance their interview
2025-01-10
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1494
Soft Deletes in Databases: To Use or Not to Use?
Article Introduction：Soft Deletes: A Question of DesignThe topic of soft deletes, a mechanism that "flags" records as deleted instead of physically removing them, has...
2025-01-10
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1090
