This article explains how to use LLVM's clang-format and clang-tidy tools for C/C++ code formatting and static analysis, covering Docker images, binary installations, and integration into development workflows via GitHub Actions and pre‑commit git hooks to enforce consistent code quality.
This article explains Netty’s reactor‑based asynchronous architecture, compares classic multithread, select, poll and epoll models, demonstrates JNI integration with C code, and provides a complete hand‑written epoll server example to illustrate high‑performance backend networking in Java.
The new Rainbow Braces extension for Visual Studio highlights matching brackets in customizable colors, helping developers quickly identify code blocks, reduce syntax errors, and improve navigation across languages like C#, JavaScript, and TypeScript.
This article explains Netty’s high‑performance asynchronous architecture, the evolution of I/O multiplexing models from select to poll and epoll, demonstrates Java‑C integration via JNI with detailed code examples, and provides a complete hand‑written epoll server in C for achieving million‑connection concurrency.
Google unveiled the experimental Carbon language at the CPP North conference, positioning it as a C++ successor with modern syntax, safety features, and seamless C++ interoperability, while industry leaders debate its readiness, purpose, and potential impact on the programming ecosystem.
Following the recent .NET Conf, this article outlines the key C# 11 enhancements—including generic math support, required class members, and raw string literals—explaining their purpose, usage, and the upcoming .NET 7 release schedule, while also noting community reactions and future .NET 8 LTS plans.
This guide introduces CodeQL, explains how to install the required tools, shows how to generate a source‑code database, and walks through basic and advanced rule syntax with practical C/C++ examples, enabling security researchers to efficiently discover vulnerabilities in large codebases.
Facing heavy GC overhead and slow model inference in a Java compute service, the authors explore using Java Native Interface to offload file loading and regression calculations to C++, detailing environment setup, Maven integration, native method implementation, common pitfalls, performance testing with JMH, and achieving up to 80% latency reduction.
This article examines the historical origin of the ++ and -- operators, explains why they were introduced, demonstrates that modern compilers no longer gain performance from them, and argues that functional‑style design, iterator‑based loops, and operator‑overloading concerns have led many contemporary languages to remove or deprecate these operators.
The article details a large‑scale C++ team's unit‑testing workflow, explaining why tests matter, how they set up cross‑platform macOS/Linux environments, adopt Google gtest/gmock with a custom Frida‑based mock, enforce coverage via gcov/lcov, compute incremental coverage, integrate Valgrind, follow deterministic test design principles, avoid common pitfalls, and embed the stable pipeline into CI gates and notifications.
The QianNiu PC cross‑platform framework adopts a COM‑style component architecture—defining interfaces, implementations, and MVP‑based UI modules, with automated code generation and lifecycle management—to achieve consistent Windows/macOS features, improve extensibility and reusability, lower development cost, and boost maintainability and efficiency.
Over three years the team built a lightweight, C++‑based cross‑platform messaging SDK for a large e‑commerce group, choosing C++ for performance, creating a custom 43‑KB/116‑KB foundation library, organizing five modular layers, employing a pure‑asynchronous thread model, and automating development with the Eyas scaffolding, language‑binding generation and unified GN builds to simplify multi‑OS deployment and reduce engineering effort.
The article details Redis’s core low‑level data structures—Simple Dynamic Strings (SDS) with length‑aware headers, a custom doubly linked list for O(1) head/tail access, and a hash‑table dictionary employing MurmurHash, incremental rehashing, and packed headers to optimize memory and performance across versions.
This article introduces CodeSmith, a template‑driven code generation tool, explains why code generators improve efficiency and consistency, demonstrates how to write and reuse templates—including Java bean generation and data‑type conversion—and shares practical tips for automating model, SQL, and UI code creation.
This article provides a comprehensive analysis of libunifex's core concepts—including Sender, Receiver, TypedSender, OperationState, Scheduler, and Structured Concurrency—explaining how they interact to enable lazy, composable asynchronous operations in modern C++.
This article compiles a curated list of popular backend development frameworks across various programming languages, detailing each framework’s key features, advantages, and typical use cases to help developers choose the right tool for modern web applications.
The June 2022 TIOBE index shows Python still leading, while C++ is poised to surpass Java into the top three, reflecting shifting popularity among programming languages and highlighting the impact of performance and language evolution on developer choices.
Microsoft announced a proprietary C# extension for Visual Studio Code to replace the open‑source OmniSharp, sparking criticism from developers like Miguel de Icaza, while promising tighter integration with Visual Studio features, raising concerns about .NET openness and the future of VS Code's C# tooling.
This article explains why traditional select and poll struggle with many file descriptors, how epoll redesigns the workflow by registering descriptors once via epoll_ctl, the kernel data structures (eventpoll, epitem) that manage events, and walks through the core functions epoll_create, epoll_ctl, epoll_wait, and their callbacks.
This timed programmer quiz combines single‑choice, short‑answer, and coding problems that test a broad spectrum of IT topics—from programming history and algorithms to Linux commands, networking layers, Helm chart concepts, and practical Python and C coding tasks—providing a holistic assessment of technical fundamentals.
This comprehensive C/C++ knowledge base covers everything from basic syntax, const, static, and this pointers to advanced topics like inline functions, virtual methods, smart pointers, STL containers, data structures, algorithms, operating system concepts, networking layers, and common interview problems, complete with code examples and diagrams.
This article examines how PHP stores variables internally by analyzing the zval structure defined in the C source code, detailing its fields, type flags, memory layout, and associated macros, and explains why each variable occupies 16 bytes at runtime.
The article details OMAX’s end‑to‑end platform for large‑scale C/C++ service compilation, covering optimization flags, profile‑guided and link‑time techniques, Facebook BOLT post‑link tuning, and real‑world results that cut CPU use, latency and deployment time while shrinking binary size.
This article explores why the naïve (a + b) / 2 formula overflows for 32‑bit unsigned integers and presents several safe techniques—including subtraction‑first, bitwise‑based, wide‑type casting, and carry‑rotate instructions—complete with C++ code and assembly examples.
This article introduces the fundamentals of heterogeneous computing on mobile GPUs, explains OpenCL concepts and its programming model, and provides a step‑by‑step example of adding two arrays with complete OpenCL code for Android devices.
The article presents a Filament‑based PBR material editor that unifies PC and mobile workflows by providing real‑time ImGui previews, JSON‑driven persistence, model optimization, texture compression, and export/import of mobile‑ready material packages, thereby lowering authoring barriers, accelerating iteration, and ensuring visual consistency across platforms.
Meituan Search solves costly multi‑language maintenance by building a core C++ library, wrapping it with a C interface, and exposing the functions to Python via ctypes and to Java via JNI or JNA, enabling shared logic, easier packaging, and lower latency on Linux.
This article explains how the Linux kernel’s likely and unlikely macros, which wrap GCC’s __builtin_expect, guide branch prediction to improve cache utilization and pipeline efficiency, and demonstrates their impact with sample code and assembly analysis.
The long‑standing Chinese Windows utility PDF Patcher, known for its extensive PDF editing capabilities, has been open‑sourced on GitHub, revealing its C# and C codebase, .NET Framework foundation, iText and MuPDF dependencies, and a unique “Conscience License” that adds moral obligations for users and developers.
The article dissects Linux’s epoll I/O multiplexing, tracing the flow from socket creation with accept through epoll_create, epoll_ctl registration, and epoll_wait sleeping, detailing the kernel’s eventpoll object, red‑black tree, per‑socket wait‑queue callbacks that enable O(log N) registration and O(1) event delivery for tens of thousands of connections.
This article compiles a curated list of major C and C++ security and coding guidelines—including 360 Safe Rules, Tencent Security Guide, Huawei Secure Coding Specification, Google C++ Style Guide, C++ Core Guidelines, SEI CERT, MISRA, and High Integrity C++—providing brief descriptions and direct repository links for each.
This guide shares practical C++ cross‑platform development tips, covering version selection, include guards, path handling, character encoding, inline functions, type definitions, template usage, compiler differences, and build‑time strategies to keep code portable and maintainable across Windows, macOS, and Linux.
This article examines how the memory size of C enum types varies with declared value ranges and compiler options such as -fshort-enums, showing default and shortened sizes across different compilers and illustrating the impact of adding larger constant values.
This article explains how to implement a console progress bar and countdown timer in C by covering carriage returns, newline handling, output buffering strategies, and the use of fflush to force immediate screen updates, complete with sample code and visual demonstrations.
This article explains how C# source generators introduced in .NET 5/6 can analyze compile‑time metadata and automatically generate HttpClient implementation classes, register them in the DI container, and handle multi‑project assembly analysis for streamlined API consumption.
This article explains InnoDB's lock system in MySQL, covering lock granularity, intent, shared, exclusive and auto‑increment locks, row‑lock types, the underlying C++ structures, lock mode and type encoding, and the compatibility and strength matrices that govern lock acquisition and waiting.
This article provides a step‑by‑step technical guide to implementing C++ stackful coroutines, covering the design of the owl.context API, low‑level context‑switch principles, register saving conventions on 32‑bit ARM, and complete source code for co_getcontext, co_setcontext, co_swapcontext and co_makecontext with illustrative examples and diagrams.
This guide explains the differences between carriage return and newline, explores C output buffering strategies, and provides step‑by‑step C code to create a countdown and a dynamic progress bar that updates smoothly in the terminal.
This article provides a detailed source‑code walkthrough of Envoy's outbound request processing, explaining how the proxy receives client data, parses HTTP requests, selects routes and clusters, forwards traffic upstream, handles retries and shadowing, and finally returns responses to downstream clients.
This tutorial explains how to create a console progress bar in C by covering newline versus carriage return handling, output buffering strategies, using fflush to force screen updates, and adapting the code for multi‑digit countdowns.
Linux kernels 3.9+ introduce the SO_REUSEPORT option, allowing multiple processes to bind and listen on the same port, with the kernel handling load‑balancing and security checks; this article explains the problem it solves, the underlying implementation, and provides practical C examples and verification steps.
This article provides an in‑depth analysis of Envoy's outbound request processing, covering listener initialization, the use of SO_REUSEPORT for load distribution, original destination handling, and the detailed steps of connection creation and filter chaining within the Envoy proxy architecture.
This article explains the purpose and behavior of the Thread.Sleep function in .NET, clarifies common misconceptions about its timing and effects, and relates it to operating‑system scheduling concepts such as time‑slice and preemptive multitasking.
This article walks through Redis’s annotated source code to explain how its single‑threaded architecture initializes the server, loads configuration and data, and continuously processes file and time events within a while‑loop, revealing why Redis achieves high performance without spawning additional worker threads.
This article surveys the programming languages and technologies underlying a wide range of operating systems, user interfaces, desktop tools, databases, browsers, servers, and other software, illustrating how C, C++, Java, and other languages dominate different components across the software ecosystem.
This guide outlines practical best‑practice recommendations—such as using C++17, proper header guards, forward‑slash paths, UTF‑8 encoding, restrained inline functions, standard fixed‑width types, careful char handling, readable nested templates, conditional compilation, Clang compiler, thin conversion layers, custom asserts, composition over inheritance, safe static initialization, and limited template use—to help developers write portable, maintainable, efficient C++ code across Windows, macOS, Linux, desktop and mobile platforms.
This article demonstrates how to create a basic FTP‑like file transfer application in C using Windows Winsock, covering both server and client implementations, handling file size negotiation, data transmission loops, and compilation steps, with complete source code examples.
The long‑standing Windows PDF Patcher tool, known for its rich PDF editing capabilities, has finally been open‑sourced on GitHub, revealing its C# and C codebase, .NET Framework foundation, development environment, project structure, and a unique “Conscience License” that encourages charitable giving.
This article explains how WeChat Pay tackled inconsistent iOS and Android implementations by building a unified C++ cross‑platform framework, introducing UseCase‑based business flow, a routing mechanism, and improved network request handling, resulting in fewer bugs, faster development, and higher productivity.
The article explains how to design a C++‑based multithreaded service that uses Pthreads, channels, and TensorRT to parallelize deep‑learning inference tasks, thereby reducing latency and dramatically increasing throughput for AI applications such as facial‑recognition access control systems.
This article explains why a high‑traffic platform migrated from SQL Server to Elasticsearch, covering the technical motivations, performance characteristics, indexing strategies, data synchronization methods, API design, and operational monitoring to achieve a scalable, low‑latency search solution.
This guide explains Linux kernel workqueues, their core structures and default system queues, shows how to use the schedule_work API, and walks through a complete driver example that captures the ESC key, queues a work item, and verifies execution via dmesg.
The IEEE Spectrum 2021 programming language ranking shows Python retaining the overall lead while C# jumps dramatically to sixth place, highlighting shifts in developer demand across web, enterprise, mobile, and embedded domains based on data from eight major sources.
The IEEE Spectrum 2021 programming language ranking shows Python retaining the top spot across overall and multiple sub‑rankings while Microsoft’s C# jumps from 23rd in 2020 to 6th in 2021, reflecting shifting industry demand and emerging trends.
The article explains the syntax and semantics of while(1) and for(;;) infinite loops in C, compares their generated assembly code, and demonstrates through compiled examples that both constructs produce essentially identical machine code despite minor semantic differences.
This article explains the syntax and semantics of C's while(1) and for(;;) constructs, compares their execution flow, shows how to compile each to assembly with gcc, and demonstrates that, aside from file names, the generated code is identical under typical settings.
This article explains how to improve Python performance by embedding C or C++ code: write the source, compile it into a shared library, and invoke its functions from Python with the ctypes module, providing step‑by‑step commands and example code for both C functions and C++ classes.
This article explains how Redis implements its Sorted‑Set data type by starting from a basic ordered singly linked list, analyzing its insertion and query complexities, introducing the skiplist structure, deriving its O(log N) performance, and detailing the underlying C source code for creation, insertion, lookup, and deletion.
This article explains the theoretical and practical range of Tencent QQ numbers, why the lower limit is set to 10001, how unused accounts are reclaimed, and demonstrates how bitmap techniques can efficiently deduplicate billions of QQ IDs using simple C++ code.
This article explains how Redis implements its Sorted‑Set using a skiplist, starting with the basics of a singly linked list, analyzing insertion and query complexities, deriving the skiplist structure and its O(log N) performance, and comparing it with hash tables, balanced trees, and B‑trees.
This article explains the low‑level principles of C++ coroutine context switching, walks through the owl.context API design, demonstrates assembly implementations for co_getcontext, co_setcontext, co_swapcontext and co_makecontext, and provides practical examples and code to build stackful coroutines on 32‑bit ARM.
The article describes how a C++‑based cross‑platform framework, combined with UseCase abstraction, routing mechanisms, unified network request handling, and strict data‑transfer rules, solved iOS/Android inconsistencies in WeChat Pay, cut code size by 45%, kept crash rates stable, and dramatically improved development efficiency.
This guide explains how to obtain the WebRTC m79 source, compile it for Windows, Android, and iOS, walk through the basic signaling and peer‑connection workflow, and implement advanced video‑capture and audio‑volume features with custom C++ extensions, while unifying the codebase across platforms.
The article explores how Tarn Adams has single‑handedly maintained and expanded the indie game Dwarf Fortress for two decades, growing its C/C++ codebase to over 700,000 lines, funding development through donations, and continuously adding new gameplay modes and AI features without major refactoring.
This tutorial walks through building a simple Whack‑a‑Mole Unity game, adding scene objects and state‑machine scripts, then integrating Agora's voice SDK to create a worldwide voice chat channel, complete with code examples and step‑by‑step instructions.
This article presents the complete Unity source code of the "Protect the Kitten" 2D mini‑game, explains its project structure and core scripts, and demonstrates how to integrate Agora's audio SDK to add simple voice‑chat functionality, with download links for the full project.
This article recounts a disastrous 12‑year software project with over 6 million lines of C++ code, outdated CORBA middleware, chaotic version control, and absurd management practices, illustrating how technical debt and bureaucratic mismanagement can doom even the most ambitious engineering efforts.
Visual Studio 2022 has been officially released with a go‑live license, bringing 64‑bit support, .NET 6, C++ 20, Azure Cloud Services, hot‑reload, enhanced debugging, Git integration, UI personalization, and many other productivity improvements for developers across languages and platforms.
This article explains how a Windows PE executable is launched, detailing the creation of the process and main thread, the role of the OEP, and how the runtime startup functions like _tmainCRTStartup ultimately invoke the user-defined main/wmain function.
This article explains the motivation behind creating the C++ coroutine framework "owl" for the cross‑platform WeChat client, compares callback, promise, and coroutine approaches with code examples, and details its design choices such as stackful coroutines, single‑thread scheduling, structured concurrency, and performance characteristics.
This article investigates the high CPU usage and latency observed after expanding a large Redis cluster, analyzes the root cause in the CLUSTER SLOTS implementation and client MOVED handling, proposes an optimized slot‑traversal algorithm, and demonstrates significant performance improvements through benchmarking and profiling.
In large Redis clusters the original CLUSTER SLOTS implementation traversed every master and all 16,384 slots, causing ~52 % CPU usage and high MGET latency during migrations, but redesigning it to iterate the pre‑built slot array reduced complexity to O(total slots), cutting execution time from 2 ms to 0.17 ms and eliminating the CPU hotspot, a fix now merged into Redis 6.2.2.
This article explains how Android captures ANR events by intercepting the SIGQUIT signal, covering the relevant signal‑handling functions (kill, signal, sigaction, sigwait, pthread_sigmask), their differences, the SignalCatcher thread implementation, and how developers can create custom SIGQUIT monitors for ANR analysis.
This article introduces an open‑source SMS verification module, outlines essential security features such as code expiry, length limits, request throttling, and one‑time use, and provides complete C# implementations for generating, sending, and validating both image and SMS captchas.
This article explains what program core dumps are, how to interpret core‑dump files, and provides detailed GDB debugging techniques—including register inspection, stack frame analysis, variable printing, memory dumping, and handling optimized code—to locate and resolve the root causes of crashes.
This article explains why unit testing is essential for reducing code complexity, outlines common testing models, provides language‑specific best practices for Java, C++, and Python, and describes how to measure test coverage and effectiveness across large‑scale projects.
This article explains the thread‑merging problem that arises when using PlatformView in multi‑engine Flutter scenarios, analyzes its root causes in both independent and lightweight engines, and presents a comprehensive solution—including code changes, task‑queue merging logic, and practical implementation details — that has been merged into the official Flutter engine repository.
This article shares a 985 graduate's personal background, systematic interview preparation for C++ and Go backend positions, detailed interview question collections from major tech companies, and practical advice on study resources, project presentation, and coding practice to help candidates succeed in technical interviews.
This article explains the merge sort algorithm’s divide‑and‑conquer principle, analyzes its O(n log n) time complexity, and provides two complete C# code examples—one for a generic merge sort and another for merging two already sorted arrays—along with visual illustrations of the merging process.
IEEE Spectrum’s 2021 programming language ranking, based on eight online data sources and eleven metrics, lists the top 55 languages, highlights a stable top five with Python leading, and reveals notable shifts such as C#’s rise to #6 and HTML entering the top ten.
This article details a graduate student's AI‑driven solution to the Tencent Geek Competition's "E‑Tetris" challenge, describing the EI‑Tetris heuristic, feature‑based evaluation, state‑pruned dynamic programming, C++ implementation, performance results, and potential improvements.
This article walks through embedding the V8 JavaScript engine into a C++ game server, demonstrates a HelloWorld example, shows how to bind C++ classes using Puerts, and explains how to compile and embed a full Node.js runtime, with complete code snippets and a GitHub repository link.
This article analyzes popular programming languages—including PHP, Java, C, C++, Python, Go, and JavaScript—to help beginners decide which language to start with in 2021, highlighting each language's strengths, job prospects, and suitability for newcomers.
This article explains the hierarchical design of network libraries, detailing the roles of Session, Connection, Channel, and Socket layers, their interactions, code examples, and how they can be combined or extended for various backend services.
This article explains the basic network programming pattern, introduces epoll as an I/O multiplexing solution for high‑concurrency servers, and demonstrates how Redis 5.0 integrates epoll through its event‑loop abstraction with detailed code examples and debugging tips.
The article describes how a C++‑based cross‑platform framework and a unified routing mechanism were introduced to solve iOS and Android inconsistencies in WeChat Pay, resulting in fewer bugs, 45% less code, faster feature delivery, and a more reliable data‑flow architecture.
This article explains how PyTorch's BP Engine dynamically builds the computation graph for back‑propagation, detailing its C++ class structure, thread management, task queues, and key functions such as start_threads, compute_dependencies, execute, and evaluate_function, with illustrative code examples.
This article explains how PyTorch implements its dynamic autograd graph using the core C++ classes Variable, Function, and Engine, detailing their initialization, inheritance hierarchy, code structures, and the execution flow of backward propagation.
This article explains Redis's Simple Dynamic String (SDS) data structure, its internal layout, how it differs from traditional C strings, and the performance, memory‑reallocation, and data‑format benefits it brings to Redis's key‑value storage.
This article traces the ten‑year evolution from Emscripten’s early C++‑to‑JavaScript compiler through asm.js to modern WebAssembly, highlighting key milestones, technical challenges, performance optimizations, and real‑world applications such as games, AutoCAD, and Google Meet, while providing code examples and installation steps.
July’s TIOBE Index, marking its 20‑year anniversary, shows C, Java and Python retaining the top three spots with narrowing gaps, highlights rising gains for C++, Go, Rust, TypeScript and others, and provides a detailed look at the top‑50 language rankings and historical trends.
This article provides an in‑depth English overview of PHP’s SAPI architecture, detailing the CGI SAPI module structure, the core _sapi_module_struct and sapi_globals definitions, and walking through the startup sequence including sapi_startup, sapi_globals_ctor, and FastCGI initialization with code examples.
This article explores how the C++‑based Klee framework brings component‑based, data‑driven, and reactive UI development to native mobile and desktop apps, comparing its efficiency and architecture with modern web frameworks and RxSwift, and showcasing practical code examples.
The article recounts a recent project where reusing existing stored procedures to check a user's Job, Certification, and Disclosure data led to maintenance headaches, prompting a discussion of alternative approaches, their drawbacks, and why duplicating the query sometimes becomes the only viable solution.
This article chronicles the ten‑year evolution from Emscripten’s C++‑to‑JavaScript compiler through asm.js to the modern WebAssembly standard, highlighting key milestones, performance challenges, and real‑world applications that have reshaped what browsers can achieve.
libtask, a lightweight coroutine library written by Russ Cox, demonstrates how to build a cooperative multitasking scheduler in C, detailing task creation, context switching, epoll‑based I/O handling, and a non‑preemptive FIFO scheduling model that enables asynchronous I/O to appear synchronous for server development.
The article presents recent market‑share data for programming languages, showing a decline in C/C++ and a rise in Java, and pairs this with salary charts that illustrate current compensation trends across these languages.
Gaode’s new serverless/FaaS platform, built on Alibaba Cloud Function Compute with custom C++, Go, and Node.js runtimes, now processes over 100 000 QPS, enabling a unified client‑cloud codebase, rapid feature iteration, automatic scaling and cost savings, while supporting extensive monitoring, Dapr integration, and future edge‑computing enhancements.
This article explains what WebAssembly is, why it was created, how to compile C or Rust code to .wasm, integrate it into JavaScript projects, and showcases real‑world performance gains and use cases such as image processing and barcode scanning.
A sysadmin narrates how he monitors four Redis nodes, detects master failure with PING, promotes a slave using SLAVEOF, reconfigures the remaining replicas, and ultimately automates the entire process with a custom Sentinel program and a multi‑node Sentinel cluster for high availability.
