Programmer Group

Database introduction: Carrier for data storage in the operating system: Windows. Linux and macos are file based operating systems Database system: refers to a system that can provide information services for users. It achieves organized. The function of dynamically storing a large amount of relevant data provides a convenient means for data ...

Flask is a lightweight Web application framework written in Python, which can quickly implement a website or Web service using Python language. 1, Introduction Directory framework (simplest) Flask-demo/ ♪ run.py: application launcher ♪ config.py: environment configuration ├ static/ │♪ css /: css file directory │♪ img /: picture file dire ...

preparation We know that the secret of SpringBoot's automatic assembly is in the spring.factories file under the org.springframework.boot.autoconfigure package, and the principle of embedding Tomcat is a configuration class loaded in this file: org.springframework.boot.autoconfigure.web.servlet.servletwebserverfactory autoconfiguration @Configu ...

0 originIn September this year, the Department platform project I was responsible for released a new version, which also launched a new function. In short, it is a little similar to scheduled tasks. On the first day, everything was normal, but on the second day, very few tasks were not executed normally (the suspended tasks continued to be exec ...

This paper mainly describes how to use STM32F103C8T6 to transplant uCOSIII operating system, build three tasks, control the LED on-off in 1s and 3s, and send "hello uc/OS! Welcome to RTOS multitasking environment" through serial port in 2s cycle. In addition to mastering the Keil simulation and debugging code function, SaleaeLogic16 i ...

Requirements: Search for people nearby through the specified points. It is required to filter the age, sort the results according to the distance, and show how far she / he is from you Design: ES provides many ways to search geographic locations: geo_bounding_box : find the point in the specified rectangle. geo_distance : find the point withi ...

Problem A - Find the 3-bit even number meaning of the title Any three numbers in the array are spliced into three digits. Non even numbers and no leading 0 are required. All qualified numbers are returned in ascending order thinking See that the range of the given array is 100, and directly triple loop. Since the requirement is not repeated, i ...

1, Naming conventionsNaming conventions commonly used in the market:Camel case (small hump Nomenclature - initial lowercase)PascalCase (hump Nomenclature - capital letters)Kebab caseSnake (underlined)1.1 naming of project documents1.1.1 project nameAll in lowercase, separated by dashes. Example: my project name.1.1.2 directory nameRefer to the ...

1, What is UCOS III Ucosiiii is a tailorable, curable, and deprivable multitask system, which has no limit on the number of tasks. It is the third generation kernel of UCOS. Ucosiiii has the following important characteristics: Deprivable multitasking Management: UCOSIII and UCOSII belong to the deprivable multitasking kernel and always execut ...

Data description Data parameters OrderNumber: customer nickname LineNumber: purchase order. For example, the first three lines respectively represent three goods purchased by the same customer Model: trade name Problem description Application of intelligent algorithm recommendation of association rules based on shopping basket. Three basic ...