This article explains the background of RESTful APIs, outlines recommended URL and parameter formats, details HTTP methods, response structures, filtering, pagination, status codes, hypermedia links, and extension considerations to help developers design robust, standardized backend services.
This article explains Python’s built‑in numeric objects—including integers, longs, floats, complex numbers, booleans, and fractions—covers constant formats, version‑specific division behavior, and demonstrates how to use the Fraction class for precise rational arithmetic.
This article explains HTTP/2 fundamentals, showcases its adoption by major Chinese sites, and provides a step‑by‑step Node.js tutorial—including installation, SSL setup, server code, and a demo that fires 100 parallel requests—to help developers experience the protocol’s benefits.
This article walks through the inner mechanics of JavaScript Promises, explaining their basic prototype, asynchronous handling with the event loop, state management, chainable behavior, and error handling, all illustrated with step‑by‑step code examples and diagrams.
This guide demonstrates how to create a CAPTCHA verification feature in Java by generating random characters and interference lines using Graphics, serving the image via a servlet, and integrating it into an HTML registration page with JavaScript for dynamic refresh.
To tackle Meituan‑Dianping’s massive POI and user data challenges, the team built a hybrid 3NF‑plus‑dimensional data warehouse with ODS, BAS, FACT, and optional TOPIC layers, added Kylin‑based pre‑computation cubes, a plug‑in middle‑platform service (metric dictionary, rule engine, compute engine), and interactive ECharts visualizations, delivering unified metrics, faster ad‑hoc queries, scalable analytics, and reduced development costs.
Logan is Meituan‑Dianping’s native C‑based mobile logging library that uses MMAP caching, streaming compression and encryption, and a unified protocol to eliminate Java‑heap GC pauses, prevent log loss, secure data, and provide efficient retrieval and proactive reporting across dozens of apps.
This article explains the TCP TIME_WAIT state, its role in connection termination, the performance impact of large numbers of TIME_WAIT sockets, and practical optimization methods such as using keep‑alive and tuning Linux kernel parameters to mitigate the issue.
Pluto is an iOS layout engine that uses JSON/JS files to describe UI elements, dramatically improving development efficiency while maintaining smooth performance and low memory usage for complex feed styles.
This article explains why a robust engineering culture is essential for delivering the right work quickly, outlines practical steps to define core values, establish execution mechanisms, and nurture continuous improvement, while highlighting real‑world examples from companies like Spotify and Google.
This article examines the evolution, strengths, and drawbacks of major video codecs—H.264, HEVC, VP9, and AV1—while offering practical criteria for selecting the most suitable standard and encoder for modern streaming services.
This article explains the principles, biological inspiration, network structure, training process, design parameters, and practical differences of Self‑Organizing Maps (SOM), an unsupervised neural network used for clustering, visualization, and feature extraction, and compares it with methods like K‑means.
This article explains how to avoid data races in high‑traffic distributed systems by comparing pessimistic and optimistic concurrency control, demonstrating RDBMS row locks and a Redis‑based distributed lock implementation with Python code examples.
Linux’s free command often shows high memory usage, leading many to think the OS consumes RAM, but understanding buffers, cache, and the distinction between used and free memory reveals that Linux efficiently utilizes idle memory to improve I/O performance, as demonstrated by simple read‑speed experiments.
This article explains MySQL's row‑level, table‑level, and page‑level locks, maps them to storage engines, details MyISAM and InnoDB lock types, describes the four internal lock queues, and provides practical optimization and monitoring techniques to improve concurrency and performance.
The article explains Chrome's guiding principles, multi‑process architecture, network request lifecycle, and a suite of performance optimizations—including DNS pre‑fetch, TCP pre‑connect, caching strategies, and predictive pre‑rendering—that together reduce latency and make the browser faster as users continue to browse.
This article explains how Alibaba’s lightweight web server Tengine leverages Intel QuickAssist Technology to offload SSL operations via an async ssl_async module, detailing its architecture, integration with OpenSSL, performance gains across various cipher suites, and the resulting multi‑fold increase in HTTPS throughput.
In early 2018, twelve Alibaba scientists forecast how frontier technologies such as AI, quantum computing, IoT, edge computing, blockchain, autonomous driving, computer vision and speech interaction will impact society, industry, and daily life, highlighting key challenges, opportunities, and expected breakthroughs across these fields.
This article compiles a comprehensive set of commonly used regular expressions for validating numbers, characters, and special data formats such as emails, URLs, phone numbers, and monetary values, providing developers with a handy reference to streamline input validation tasks.
Facing billions of rows spread across 1024 tables in 64 databases, a Chinese gaming platform replaced its custom sharding framework with TiDB, achieving real‑time OLTP consistency, elastic scaling, robust backup, high availability, and lower migration costs while preserving MySQL compatibility.
