This tutorial shows how to use Python's urllib and XPath to accurately extract product details such as name, link, image, and price from JD.com search results, offering a clearer alternative to regular expressions and BeautifulSoup.
This article presents a detailed Java learning roadmap covering core language fundamentals, intermediate topics like I/O and multithreading, advanced concepts such as design patterns and frameworks, front‑end basics, databases, J2EE, popular frameworks, server technologies, development tools, and practical project recommendations.
This tutorial shows how to generate a labeled dataset from the open‑source WordPress "Really Simple CAPTCHA" plugin, train a lightweight convolutional neural network using Python, OpenCV, Keras and TensorFlow, and decode real captchas within fifteen minutes, demonstrating the power of modern computer‑vision techniques.
This article explains how to use a Linux server with iptables to accelerate business traffic via a dedicated relay point, covering technical choices, configuration of DNAT/SNAT, static routing, testing methodology, and performance results.
This guide explains the purpose of Geth’s attach command, compares it with the console option, and provides step‑by‑step examples for connecting to a running Ethereum node on both Linux (using the IPC file) and Windows environments.
This article examines typical MySQL concurrency problems—including table lock‑induced slow queries, metadata lock blocking during online schema changes, deadlock scenarios, and lock‑wait timeouts—provides step‑by‑step reproductions, analysis of lock behavior, and practical mitigation strategies such as using InnoDB, online DDL tools, and monitoring techniques.
This article explains why modern microservices need a client‑side discovery mechanism, how a Service Registry enables dynamic lookup of service instances, and outlines the advantages, drawbacks, and typical implementations such as Netflix OSS.
This guide explains how to use Python and the Splinter library to automate login, search, and booking on China’s 12306 railway website, covering required tools, key URLs, control identification, cookie extraction, and running the script while noting the remaining captcha step.
This guide explains why learning JavaScript is a lucrative career move and provides a detailed five‑month roadmap—covering fundamentals, tools, frameworks, and deployment—to help beginners and seasoned developers quickly become employable and confident programmers.
The 2017 JavaScript State of the Nation survey of 23,000 developers uncovers the rise of React, shifting roles of Angular and Vue, salary‑driven technology choices, the surge of GraphQL and TypeScript, and how JavaScript is expanding far beyond the browser into back‑end and IoT.
This article explains the Meltdown and Spectre speculative‑execution CPU flaws, introduces the alleged Skyfall and Solace vulnerabilities, lists affected hardware and operating systems, and provides a detailed FAQ on detection, patches, performance impact, and safe mitigation steps.
This article explains how Java strings are defined, how assigning one string variable to another copies the reference, how concatenation creates a new immutable string object, and why mutable alternatives like StringBuilder should be used to avoid excessive garbage collection.
This guide explains how Nginx's rate‑limiting works, covering the leaky‑bucket algorithm, basic directives, burst and nodelay options, whitelist handling, logging, custom error codes, and advanced configuration examples for securing and optimizing HTTP request traffic.
This article explains the microservices architecture style, compares it with monolithic and SOA approaches, outlines design principles, communication mechanisms, data decentralization, integration patterns, and discusses the advantages and disadvantages of adopting microservices in modern software systems.
The Ant Financial ATEC Conference in Silicon Valley showcased leading fintech experts discussing the company’s BASIC strategy—spanning Artificial Intelligence, Blockchain, Security, IoT, and Computing—while presenting new open‑source services and outlining future global technology outreach.
FastDFS is an open‑source lightweight distributed file system written in C, designed for high‑availability file storage and load balancing; this article explains its differences from Hadoop, details its Tracker and Storage architecture, outlines file upload/download workflows, and provides step‑by‑step instructions for installing and configuring FastDFS, Nginx, and related components.
This guide compiles essential Python snippets for tasks such as image manipulation with Pillow, video downloading via youtube‑dl, inspecting request objects, accessing NetEase Cloud Music, retrieving financial data with Tushare, running Docker‑based vulnerability labs, querying Beijing bus real‑time info, extracting articles with Goose, performing sentiment analysis, generating fake user agents, and more.
This comprehensive tutorial explains the fundamentals of Linux Virtual Server (LVS), its architecture, scheduling algorithms, and detailed step‑by‑step configurations for NAT, DR, and Tun modes, including scripts, iptables rules, and keepalived HA integration, with testing procedures and reference links.
This article explains how using an API gateway as a single entry point enables diverse client types—desktop browsers, mobile apps, and native applications—to efficiently retrieve product details from multiple microservices while handling network constraints, service discovery, and security.
This guide explains how to use Fiddler to capture mobile HTTP traffic, modify responses via AutoResponder, and simulate network speeds, providing step‑by‑step instructions for enabling remote connections, setting device proxies, customizing response rules, and throttling bandwidth for testing purposes.
