This article explains how we designed and implemented a scalable OAuth token storage and refresh system using Tarantool’s in‑memory database, Raft leader election, sharding across multiple data centers, and a custom lightweight queue to handle high‑throughput token updates while maintaining consistency and fault tolerance.
The article introduces the Tencent Social Ads university algorithm contest weekly champion team Groot, details their background, and outlines their practical machine‑learning approach—including training set construction, XGBoost model selection, and feature engineering—while encouraging broader participation in such competitions.
Alibaba and Ant Group had five research papers accepted at the 2017 KDD conference, covering topics such as intelligent ad pricing, graph‑based behavior prediction, conv‑RNN semantic encoding, cascade ranking, and a distributed learning platform, all of which have been applied in their production systems.
This article examines the usability trade‑offs of pagination, "load more" buttons, and infinite scroll, referencing Baymard research to help designers choose the most effective data‑loading interaction for their product's context and improve overall user experience.
This guide introduces the most commonly used Linux commands—including navigation, file listing, searching, process management, and system monitoring—explaining their syntax, useful options, and practical examples to help developers work efficiently in a Linux environment.
This guide explains why Python's clear syntax and powerful libraries make it perfect for newcomers, offers practical steps like downloading the interpreter, choosing IDEs, selecting beginner books, joining discussion groups, coding daily, and leveraging existing packages to accelerate learning.
This article explores how big data analysis can determine the demand, optimal placement, and profitability of beverage vending machines in Beijing subway stations, detailing passenger flow statistics, gender ratios, consumption patterns, and revenue projections to illustrate data‑driven operational strategies.
This article introduces Ykit, a Webpack‑based build tool created to simplify environment setup, reduce configuration complexity, and accelerate build times through entry filtering, multi‑process compression, and a rich plugin ecosystem, sharing its adoption and future roadmap at Qunar.
The article analyzes how expanding demand and cross‑industry convergence are driving High‑Performance Computing (HPC) to become the next technology hotspot, covering its market segmentation, cloud integration, storage challenges, key vendors, and future trends such as HPDA, Burst Buffer, and open‑source file systems.
Hyperloop is Meituan‑Dianping’s integrated release‑scheduling platform for iOS, consolidating component publishing, CI, packaging and resource allocation into a single web‑fronted system that replaces fragmented Jenkins jobs with plugin‑based checks, real‑time status, centralized metrics and automated notifications, streamlining over 300 components across multiple apps.
This article provides Android developers with practical guidance on using Kotlin instead of Java, covering basic syntax, data classes, singletons, activity navigation, Retrofit with OkHttp, and RxJava to streamline development and improve productivity.
This article explains Google’s HEART framework—Happiness, Engagement, Adoption, Retention, and Task Success—detailing how each metric is measured and improved through surveys, analytics, cross‑platform prompts, onboarding flows, and targeted UI tweaks to enhance overall product experience.
This article explains why 32‑bit floating‑point numbers cause matrix and depth‑buffer precision issues in WebGL map rendering and presents three GPU‑based solutions, a sub‑coordinate system method, and JavaScript adjustments to eliminate visual jitter and Z‑fighting.
The article analyzes the challenges of tightly coupled modules in rapidly growing projects, proposes a Router model that encapsulates and distributes inter‑module calls, discusses its core concepts, implementation options, and extensions such as interceptors, and shares practical lessons learned after two years of use.
The article explains how applying continuous delivery and infrastructure automation enables self‑service, allowing developers to focus on business logic while operations concentrate on environment optimization, and how containers further separate development from operations roles, addressing coupling in business, organization, architecture, and roles.
This article explains why a Janus gateway’s QPS stalled under large payloads, how enabling NIC multi‑queue and binding interrupts to specific CPUs (IRQ affinity) resolves the bottleneck, and provides practical commands and a script for Linux network interrupt tuning.
This article explains what big data is, outlines its 5V characteristics, and showcases numerous real‑world applications such as personal finance monitoring, tax fraud detection, healthcare prediction, public opinion tracking, precise marketing, product development, traffic planning, strategic decision‑making, and credit scoring.
This guide shows how to use Linux commands such as lsof and netstat to identify occupied ports, explains the meaning of key parameters, and provides a Python script that monitors specified IP ports for availability, complete with example output.
This tutorial shows iOS developers how to set up Python on macOS, install pip and BeautifulSoup, fetch a web page with urllib2, parse the HTML to locate image tags, extract their URLs, and download the images programmatically for use in an app.
This article explains why Alibaba's Cognitive Computing Lab uses StarCraft as a research platform, outlines the game's unique challenges for AI, and details their deep reinforcement learning and multi‑agent approaches, including the BiCNet architecture and experimental results.
