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This article explains what the NOLOCK hint does in SQL Server, why it is used, how it relates to transaction isolation levels, presents practical tests, discusses the relevance of NOLOCK after newer SQL Server versions, and shows why MySQL does not need an equivalent hint, offering guidance on when to apply it.
The event showcases three technical talks covering the evolution of Hujiang's storage architecture, the transformation of the Dianrong payment system into a public service, and an introduction to the TiSpark project that integrates TiDB with Spark, highlighting design choices, trade‑offs, and future directions.
This article explores how to apply Domain‑Driven Design principles to structure and simplify a complex e‑commerce transaction system, detailing sub‑domain division, model refinement, core order‑service design, and the use of design patterns to achieve a maintainable backend architecture.
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 how Android O uses seccomp filters in the zygote process to block unused or dangerous system calls, how developers can detect and avoid illegal calls that cause crashes, and how to test or disable the filter on development builds.
This tutorial walks through creating a comfortable frontend development workflow by installing Node.js, managing packages with npm and nrm, initializing a project, configuring Webpack with Babel and SASS loaders, and enabling hot module replacement for seamless code updates.
This article shares practical insights on building robust user account systems, covering the shift from usernames to phone numbers as unique identifiers, the drawbacks of passwords, the limited value of periodic password changes, the pitfalls of security questions, and best practices for token management, SMS/voice verification, captcha usage, and multi‑layered future security strategies.
This article presents a comprehensive WeChat Mini Program tutorial, outlining the course curriculum from introductory to advanced chapters, and provides step‑by‑step instructions for installing and configuring the WeChat Web Developer Tool on macOS, including project creation, appID setup, and debugging workflow.
This article presents a comprehensive Mini Program tutorial covering the full course syllabus—from introductory setup and appID registration to intermediate project structure, utility extraction, network handling, list and detail page implementation—along with a detailed step‑by‑step guide for obtaining and configuring an appID.
This article demonstrates how to build and train a bi‑directional LSTM sentiment analysis model with TensorFlow, covering data preprocessing, word embedding, model architecture, code implementation, and evaluation results, and discusses potential improvements.
