Qt C++ Architect Series – Project Practice Episode 127: QTableView + Model + Delegate Technology – Disk Heartbeat Monitoring Analyzer

Congratulations on visiting the 【JueDingGe Programming】 WeChat public account 【Knowledge Repository】, specially customized for everyoneQt C++ Architect Series – Project Practice Episode 126:This issue focuses on a practical and challenging technical topic – 【QTableView + QAbstractTableModel + Custom Delegate Project Technology: Disk Heartbeat Monitoring Performance Analyzer】.Whether you are a beginner who has just mastered the … Read more

Understanding the Destruction Order of Static Objects in C++

In the vast world of C++ programming, the static keyword acts as a low-key yet crucial behind-the-scenes hero, widely used in variables, functions, and class members, playing an indispensable role. From modifying local variables to retain their state, to limiting the scope of functions, and to achieving shared class members, the presence of static is … Read more

C++ Monthly Highlights – Issue 11

This month’s C++ topic overview! (2025-08) 1. Structured Binding Variables Do Not Trigger NRVO #include <iostream>#include <tuple>#include <utility> struct T { T() = default; T(const T&) { std::cout << "Copy constructor called\n"; } T(T&&) noexcept { std::cout << "Move constructor called\n"; }}; std::pair<int, T> foo() { return {std::piecewise_construct, std::forward_as_tuple(42), std::forward_as_tuple()};} T func() { auto [x, … Read more

C++ Memory Usage Retrieval

In C++, there is no direct functionality to retrieve hardware information. However, with the implementation at the platform level, obtaining hardware information becomes easier. For example, using the Windows system’s windows.h. So how do we retrieve memory usage? You can use the following method: Memory Information Class Declaration RAMInfo.h: #pragma once namespace xm { class … Read more

Comprehensive Analysis of C++ Modifiers: A Deep Dive from Basic Types to Modern Compile-Time Features

Table of Contents 1. Overview of Type Modifiers 2. Basic Type Modifiers • signed/unsigned • short/long/long long • Combination Usage Rules 3. Storage Class Modifiers • auto (Changes before and after C++11) • register • static • extern • mutable 4. Type Qualifiers • const • volatile • constexpr (C++11) 5. Access Modifiers • public/private/protected … Read more

cargs: A Lightweight Cross-Platform Command Line Argument Parsing Library

cargs: A Lightweight Cross-Platform Command Line Argument Parsing Library In C++ development, handling command line arguments is a common requirement. Whether for developing tools, automation scripts, or system monitoring programs, an efficient and concise way to parse command line input is needed. The cargs library is designed to address this issue. It is a lightweight, … Read more

The Guardian of Stable Program Operation: A Detailed Implementation of C++ Watchdog

In critical scenarios such as industrial control and server applications, the stable operation of programs directly relates to business continuity and system reliability. Imagine if a server program suddenly becomes unresponsive without anyone knowing; it could lead to severe consequences such as data loss and service interruption. Today, we will introduce the “Watchdog” technology, which … Read more

C++ Notes: Const Correctness and Immutability Design

Master the correct usage of the const keyword, establish a mindset for immutability design, improve code quality and safety, and avoid common pitfalls in const usage. 🎯 Use Cases • API Design: Provide const guarantees for function parameters and return values • Class Design: Distinguish between const and non-const member functions • Thread Safety: Use … Read more

Comprehensive Guide to C++ Memory Management: From Alignment to Leak Prevention

1.1. Memory Alignment: Hidden Costs of Structures Principle Revealed The compiler inserts padding bytes between structure members to improve access efficiency. For example: cpp struct Data { char c; // 1 byte int i; // 4 bytes → Actual usage4 bytes (including3 bytes padding) }; Actual layout:[c][pad][pad][pad][i], total size8 bytes. Optimization Techniques · Use#pragma pack(1) … Read more