Set Python Guesthouse as “Starred⭐“ to receive the latest news first Many beginners prefer to use global variables because they are easier to understand than passing parameters around functions. Indeed, using global variables is convenient in many scenarios. However, as the codebase grows and multiple files are involved, global variables can become quite chaotic. You … Read more
Content from: Programmer Lao Liao https://www.bilibili.com/video/BV1s5WVz9EwN/ Chapter 1: Singleton Pattern (C++) The description of the Singleton pattern is: Ensure that a class has only one instance and provide a global access point to that instance. The most important characteristic of the Singleton pattern is: A class can have at most one object. Intent: Ensure that … Read more
Circular references in singletons are most likely to occur in logging modules and configuration management modules. If a circular reference is triggered during the construction phase, it can be guaranteed by the uniqueness of static variable initialization in C++11. The danger lies in triggering a circular reference during the destruction phase, which can lead … Read more
#cpp #singleton 📌 In-Depth C++ Singleton Pattern: Principles, Implementation Comparisons, and shared_ptr Architecture Design 1️⃣ What is a Singleton? Basic Semantics and Usage Scenarios A Singleton ([[Singleton]]) is one of the most common object creation patterns, aimed at ensuring that a class has only one instance in the system and provides a global access point. … Read more
Introduction: MQTT is an instant messaging protocol developed by IBM. MQTT is a connection protocol aimed at M2M and the Internet of Things, utilizing a lightweight publish and subscribe message transmission mechanism. You can directly download the source code of the MQQT service from GitHub, source code address: https://github.com/mqtt/mqtt.github.io/wiki/libraries Main Content: Official Document Translation: The … Read more
1. Class Reflection After analyzing simple classes and structures, we can further analyze the reflection of ordinary classes. There are generally several situations for reflecting a class: 1. Creating and matching objects by class name 2. Reflecting class member variables 3. Reflecting class member functions 4. Handling class inheritance relationships. Here, we will only deal … Read more