Programmer Group

Articles Catalogue Preface Knowledge content Dead work start 1. Browser opens destination page and F12 Analysis page structure 2. Crawling page elements through Beautiful Soup 3. Save pictures Preface When doing crawling, first of all, we ...

Operators convert one or more data streams into a new data stream.Programs can combine multiple transformations into complex data flow topologies. Describes basic transformations, valid physical partitions after applying these transformations, a ...

Previously, we talked about Cplex's direct solution model for VRPTW, and now we call Cplex in the branch and bound algorithm to solve VRPTW.1. Branch and Bound Algorithms (1) Definition:(2) Solving process: 1) Determine a lower bound (initial solutio ...

day14~Incremental and Distributed Articles Catalogue @[toc] 1. Installation of redis 2. Crawl Spider-based data crawling 3. Distributed 4. Incremental Formula 5.scrapy improves data crawling efficiency 6. Virtual Environment Yesterday's revie ...

Articles Catalogue What is nginx? nginx application scenario Installing Nginx in Windows Advantages and disadvantages of nginx nginx implements reverse proxy What is Load Balancing Load Balancing Strategy nginx for load balancing nginx implements ...

Current Limiting Algorithms Counter Current Limitation Fixed window sliding window Barrel current limiting Token Bucket Leaky bucket Counter Counter current limiting can be divided into: Fixed window sliding window Fixed window The current limitation of fixed window counter is simple and clear, that is, to limit the number of requests ...

The use of JavaFX tag control was introduced earlier. It was mentioned that Label text supports Chinese fonts. What Chinese fonts does it support? Naturally, it depends on which fonts are installed in the current operating system. For the Chinese Windows system, the default installation is "SimHei" in bold, NSimSun in Song, Fang Song ...

c++ controls the color of font output _____ The default text color for the output box of a C++ console program is white, so I often refer to its output box as a black and white box.However, this text style is not fixed, it can change the color of the ...

Preface The source code involved is frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager.java vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\screenshot\TakeScreenshotService.javavendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\screenshot\GlobalScreenshot.java The ...

os module In the os module, there are many methods, some are related to directories, some are related to system files and so on. It encapsulates the API written by C language on linux operating system, such as creating files, creating directory API ...