This tutorial introduces Apple’s ARKit platform introduced at WWDC 2017, explains the required hardware and iOS version, walks through creating an Augmented Reality App project in Xcode 9, importing 3D models, configuring plane detection, and rendering a virtual cup on a detected horizontal surface using ARSCNView.
During synchronization from MySQL 5.0 to 5.7, a slave worker raised a ‘duplicate primary’ error; the article examines binlog statements, auto‑increment values, and a problematic trigger, walks through various debugging attempts, and concludes that removing the trigger resolves the issue despite unclear root cause.
The Petya ransomware, spreading across Europe and affecting over 80 companies in Russia and Ukraine, leverages the CVE‑2017‑0199 RTF vulnerability for phishing and the MS17‑010 SMB flaw for internal propagation, encrypts the MFT to render systems unbootable, and can be mitigated by applying Windows patches, using strong passwords, and backing up data.
This article explains what DevOps is, compares it with traditional development‑operations workflows, outlines its advantages and drawbacks, discusses key challenges such as balancing efficiency with stability, responsibility allocation, and measurement metrics, and concludes with practical takeaways for modern operations teams.
This guide outlines a smooth, step‑by‑step learning path for busy programmers with a bachelor's degree, covering AI fundamentals, essential mathematics, recommended courses, practical projects, deep‑learning resources, open‑source tools, and strategies to stay motivated and succeed in the field.
This article explains the GIF image format’s LZW compression, container structure, and data blocks, highlights its limitations and iOS playback issues, details the file’s header, logical screen descriptor, color tables, and extension blocks, and demonstrates how animation timing and transparency are controlled.
The article traces the history of software engineering as a continual shortening of release cycles, discusses the persistent emergence of new development models—from the waterfall to spiral and iterative approaches—and highlights George Box’s insight that while all models are imperfect, the useful ones illuminate practice.
This article explains the differences between libraries and frameworks, outlines common front‑end solution categories such as DOM manipulation, communication, utilities, templating, components, routing and architecture, and provides practical recommendations of popular JavaScript tools for each area.
This article explains how to replace Redis‑based lock with Curator's InterProcessMutex, detailing its re‑entrant design, node creation, lock acquisition logic, waiting mechanisms, and release process, while highlighting advantages over traditional Thread.sleep approaches in multithreaded resource access.
Tmall’s 618 festival showcased cutting‑edge AR, 3D interaction and cross‑screen experiences built on the TidaSDK, Interactive Alliance, Hailuo Dock platform and the Hilo3D engine, illustrating how a unified SDK and optimized web rendering enable immersive e‑commerce innovations.
This article explains transaction isolation levels, dirty reads, and phantom reads, compares how major databases such as SQL Server, PostgreSQL, MySQL, Oracle, DB2, MongoDB, CouchDB, Couchbase, and Cassandra implement these concepts, and highlights the performance‑security trade‑offs of each isolation level.
This tutorial walks through setting up Zabbix to monitor MySQL on a CentOS server, covering environment preparation, creating configuration files, adjusting paths, restarting services, applying the MySQL template on the Zabbix server, and customizing triggers and actions.
This guide walks through setting up Python 2.7 with the pywifi module, preparing a dictionary of common Wi‑Fi passwords, configuring a scanner, scanning nearby hotspots, testing each network, and recording results to identify vulnerable access points.
This article introduces the most commonly used Linux system analysis utilities—covering CPU, network, memory, and disk monitoring tools such as top, strace, perf, vmstat, netstat, lsof, tcpdump, valgrind, and iotop—explaining their key options, typical output, and practical usage scenarios for troubleshooting and performance tuning.
This talk outlines how China’s Guangfa Bank built, refined, and scaled its big‑data platform since 2014, covering data positioning, system architecture optimization, delivery model improvements, team restructuring, and real‑world use cases that demonstrate the platform’s impact on risk control, marketing and operational efficiency.
This article introduces the fundamentals of time‑series databases, compares them with traditional databases, surveys industry adoption, and details how Tiger Live leverages OpenTSDB, Grafana, and Bosun to build a scalable monitoring system for live‑streaming services.
This article offers a practical, non‑technical overview of the differences between Service‑Oriented Architecture (SOA) and Microservice Architecture (MSA), discussing concepts such as ESB, service granularity, communication protocols, complexity, maintainability, high‑concurrency handling, and Java framework choices for building robust systems.
Former Amazon senior principal scientist Ren Xiaofeng joins Alibaba's iDST as chief scientist and vice dean, sharing his reasons for choosing Alibaba, the institute's AI ambitions, and how his computer‑vision expertise will drive Alibaba's future technologies.
This article explains the evolution of real-time message delivery—from short polling to long polling, streaming, and WebSocket—introduces Socket.io, and details a multi‑node cluster architecture using Redis, Nginx, and Node.js for scalable chat applications.
A comprehensive front‑end interview guide covering HTML/CSS fundamentals, HTML5 nuances, JavaScript core concepts, Ajax techniques, jQuery usage, and miscellaneous web topics, presented as concise questions and answers to help developers prepare for technical interviews.
