C++ const members and static members

const members and static members Cont members of class const data members Const data members can only be initialized through a constructor initializer list. class Box {<!– –> private: const int length; //Length const int width; //width const int height; //height public: Box(); Box(int H, int W, int L); }; Box::Box(int H, int W, int […]

Android JNI static and dynamic injection methods

Author: MiniCode One of the more popular ways for Android to call C/C++ code is through JNI. There are two ways to implement local methods: static and dynamic Create a C project or C Module: After successful creation, the following files (CMakeLists.txt, nativelib.cpp) will be generated: Among them: CMakeLists file is used to package cpp […]

[python] Django–templates, static files, django template syntax, requests and responses

The notes are study notes compiled by myself. If there are any mistakes, please point them out~ [Django column] Django–Introduction to Django, installation of Django, creating projects, and getting started quickly Django – templates, static files, django template syntax, requests and responses Django – connect to mysql database Django–templates, static files, django template syntax, requests […]

Thread status and thread safety issues

Article directory Thread status All states of the thread Thread state transition Multi-threading vs. Single-thread Efficiency Improvement Risks of Multithreading – Thread Safety Issues Case analyze reason Solution synchronized keyword – monitor lock Use the synchronized keyword Features of synchronized mutually exclusive reentrant Thread-safe classes in the Java standard library deadlock What is deadlock Three […]

Use the Stream stream to convert the obtained object List<Object>form data into Map<Grouping conditions, quantity statistics>form

For example, the current business needs to group the obtained data, and then use another method to process the data. The methods used are Collectors.groupingBy, Collectors.counting(), Collectors.reducing(). Then, take the following example as an example to collect the obtained lists and group the obtained data by gender, with gender as K and the number of […]

Java SE packages, packages, static keywords and code blocks

1. Encapsulation 1.1 Concept of encapsulation There are three major characteristics of object-oriented programs: encapsulation, inheritance, and polymorphism. In the class and object stage, the main research is on encapsulation characteristics. What is encapsulation? simply put It’s the shell shielding details. Encapsulation: organically combine data and methods of operating data, hide the properties and implementation […]

cc1310 wireless sending and receiving status switching

Regarding the wireless sending and receiving status switching of cc1310, friends who are just getting in touch with it also have some doubts. I’ll make a personal note, hoping I won’t forget it in the future: 1. Complete the wireless configuration (be sure to understand this structure) //! Proprietary Mode Transmit Command struct __RFC_STRUCT rfc_CMD_PROP_RX_s […]

LinuxLinux dynamic library and static library

? ?Personal homepage: @Sherry’s growth path Learning community: Sherry’s path to growth (personal community) Column link: Linux The road is long and vast, and there are expectations for everything Previous blog: [Linux] Linux process control Article directory Basic principles of dynamic and static libraries Understand dynamic and static libraries Pack use Packaging and use of […]

Financial data statistical analysis system based on big data

Recommended subscription for wonderful columns: on the homepage below Author’s homepage: Computer graduate student Brother Article directory 1. Project introduction 2. Development environment 3. System display – financial data statistical analysis system based on big data 4. Code display 5. Project Summary You can help like, collect, follow and comment 1. Project introduction 1. Background […]

In embedded design, for a variable storage design with only two states, how to efficiently quantify the deviation of the tracking car…

Foreword (1) In embedded programming, we often need to store data from various sensors. Most of the time sensors, such as infrared light sensors, return data that is either 0 or 1. Therefore, only one bit is needed to store it. However, many people often use char array storage, so that only one-eighth of the […]