This case study details how Shenzhen Fangger Technology leveraged Huawei NB‑IoT technology to replace traditional solar‑powered relay gateways with direct NB‑IoT communication, solving power, installation, and interference issues while reducing costs and environmental impact in smart road parking solutions.
This article recounts the JD PLUS membership mobile redesign, detailing tight deadlines, complex business logic, front‑end/back‑end separation, Vue.js challenges, UIWebView performance bottlenecks, cross‑origin handling, Flexbox compatibility, ES6 polyfills, array reactivity, WebView caching, and Swiper integration, and how each issue was resolved.
This guide explains Linux traffic control (TC), covering its core components—queueing disciplines, classes, and filters—along with step‑by‑step commands to shape outbound bandwidth, set rate and ceiling limits, use bursts, and apply iptables marks for precise traffic management.
This article completes and supplements the earlier “Architecture Design Principles” post by presenting the concepts, forms, and design principles of software architecture, accompanied by a full‑length PPT from a recent internal training session.
This article explains how applying story thinking to the entire design process—from user research and persona creation to prototyping and validation—enhances empathy, clarifies problems, and drives more compelling, user‑centered solutions.
This guide presents a comprehensive collection of essential Linux shell commands, covering system power management, user switching, directory navigation, file operations, text processing tools, and powerful search and editing utilities, providing clear syntax and practical options for everyday command‑line tasks.
Learn how to set up a Scrapy project to crawl comprehensive car brand, series, and model data from Autohome, covering environment preparation, project initialization, spider and pipeline creation, CSV output, rate limiting, and useful debugging tips.
This article shares Tencent’s practical journey of simplifying, smartening, and deepening operations through the Cloud Operations Console, covering R&D structures, management modes, standardization, AI‑driven monitoring, and real‑world case studies that illustrate how modern DevOps can evolve in the era of AI and large‑scale services.
This article explains how server clusters manage shared storage using SCSI‑2 and SCSI‑3 reservation mechanisms, detailing their workflows, advantages, and limitations, and includes examples from Windows Server 2003 and 2008 clustering to ensure data integrity and high availability.
Choosing between Java and Python can be confusing for beginners, so this article compares their syntax length, typing discipline, execution speed, and use cases, highlighting that while Java may be more verbose and faster, Python offers concise code and easier scripting, making both valuable choices.
This article explains Java's dynamic proxy mechanism, covering the roles of InvocationHandler and Proxy classes, their APIs, the parameters required for creating proxy instances, and a complete example that demonstrates how method calls are intercepted and delegated through a custom handler.
KSQL is an open‑source, distributed SQL engine for Apache Kafka that enables continuous, real‑time queries on streaming data, lowering the barrier for analysts to perform stream processing, monitoring, security checks, and analytics without writing code.
This article presents a curated collection of twenty practical regular expressions covering password strength, Chinese characters, alphanumeric strings, email, ID numbers, dates, monetary values, phone numbers, browser versions, IP addresses, URLs, file paths, color codes, image extraction, hyperlink extraction, CSS properties, comments, and HTML tags, each illustrated with clear examples to boost development efficiency.
This tutorial shows how to combine Python's threading and Queue modules to build a producer‑consumer multithreaded downloader for Tushare stock data, dramatically reducing download time from hours to under one hour.
This article introduces Electron and the Nightmare framework, explains how to install and use Nightmare for web automation and crawling, and provides a complete example of scraping Zhihu topic data with JavaScript, Node.js, and Cheerio, including code snippets and JSON output.
The article explains TCP as a connection‑oriented protocol, contrasts it with UDP, details the three‑way handshake and four‑way termination processes using clear steps and analogies, and includes illustrative diagrams to aid comprehension.
This article explains the concepts of code coverage, describes different coverage metrics such as statement, branch, and function coverage, introduces BullseyeCoverage and gcov/lcov tools, and provides detailed step‑by‑step procedures for measuring coverage in both executable binaries and dynamic libraries for C/C++ projects.
PhxQueue, an open‑source, Paxos‑based distributed queue from WeChat, delivers at‑least‑once delivery, synchronous disk flushing, strict ordering, multi‑subscription, and high availability, outperforming Kafka in reliability and latency while maintaining comparable throughput, as demonstrated through detailed design, performance, and failover analyses.
This guide explains Linux shell's flow‑control constructs—including conditional if/elif/else, loops (for, while, until), and selection statements (case, select) —by detailing their syntax, usage rules, and providing complete script examples that demonstrate each construct in action.
This article introduces the fundamentals of web live streaming, compares common transport protocols, explains WebRTC architecture and core APIs, and highlights practical challenges and a forthcoming conference talk on applying WebRTC to low‑latency streaming scenarios.
