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IT Xianyu
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IT Xianyu

We share common IT technologies (Java, Web, SQL, etc.) and practical applications of emerging software development techniques. New articles are posted daily. Follow IT Xianyu to stay ahead in tech. The IT Xianyu series is being regularly updated.

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IT Xianyu
IT Xianyu
Jul 22, 2026 · Artificial Intelligence

Same LRU Cache Code, GPT‑5.6 Sol, Terra, and Luna Produce wildly different results

Running an identical LRU‑cache implementation request through GPT‑5.6's three models shows Sol generating 592 tokens with full tests and thread safety, Terra 315 tokens with basic functionality, and Luna only 115 tokens lacking docs and tests, leading to a cost‑benefit analysis that favors Sol for production code despite its higher token price.

AI codingGPT-5.6LRU cache
0 likes · 7 min read
Same LRU Cache Code, GPT‑5.6 Sol, Terra, and Luna Produce wildly different results
IT Xianyu
IT Xianyu
Jul 21, 2026 · Artificial Intelligence

Why Your GPT‑5.6 Plus Quota Drains Fast: Misusing the Three Modes

The author shows that GPT‑5.6 Plus splits its quota into three separate pools—Chat, Work, and Codex—and demonstrates with a script and real‑world scenarios that assigning tasks to the wrong mode can waste up to three times more quota and produce lower‑quality code, while proper mode selection conserves resources and improves results.

AI modesChatGPT PlusCodex
0 likes · 10 min read
Why Your GPT‑5.6 Plus Quota Drains Fast: Misusing the Three Modes
IT Xianyu
IT Xianyu
Jul 21, 2026 · Fundamentals

How I Rescued a Six‑File Git Merge Conflict in Three Simple Steps

When a merge of a feature branch produced six conflicted files that turned completely red, the author avoided a risky reset and resolved the conflict in under 30 seconds by using three precise Git commands, while also showing how to recover mistakenly deleted branches and lost stashes.

Command LineGitbest practices
0 likes · 8 min read
How I Rescued a Six‑File Git Merge Conflict in Three Simple Steps
IT Xianyu
IT Xianyu
Jul 20, 2026 · Artificial Intelligence

Why GPT‑5.6’s Real Breakthrough Is No Longer Hand‑Holding Prompts

GPT‑5.6 boosts evaluation scores by 10‑15% while cutting token usage 41‑66% and costs up to two‑thirds, introduces ChatGPT Work that autonomously handles end‑to‑end tasks, and offers three model tiers (Sol, Terra, Luna) that let users choose performance versus price, fundamentally changing how we prompt AI.

AI productivityChatGPT WorkGPT-5.6
0 likes · 9 min read
Why GPT‑5.6’s Real Breakthrough Is No Longer Hand‑Holding Prompts
IT Xianyu
IT Xianyu
Jun 25, 2026 · Artificial Intelligence

GPT Plus vs. Pro: Which Plan Suits Developers Who Monetize with GPT?

The article compares GPT Plus and ChatGPT Pro, explaining how usage intensity, task complexity, and delivery stability determine which subscription is appropriate for programmers, freelancers, and anyone earning money with GPT.

AI toolsChatGPT PlusChatGPT Pro
0 likes · 6 min read
GPT Plus vs. Pro: Which Plan Suits Developers Who Monetize with GPT?
IT Xianyu
IT Xianyu
May 18, 2026 · Industry Insights

From Chatbot to Work Assistant: Six Months of AI Advances, Gaps, and Real User Experiences

Over the past six months, AI models have raced through twelve major version updates, narrowing the US‑China performance gap to just 2.7%, while delivering impressive coding and reasoning abilities but still suffering from hallucinations, outdated knowledge, and uneven real‑world usefulness that ordinary workers feel daily.

AI hallucinationAI market competitionAI productivity
0 likes · 9 min read
From Chatbot to Work Assistant: Six Months of AI Advances, Gaps, and Real User Experiences
IT Xianyu
IT Xianyu
Jan 17, 2026 · Databases

Master Oracle OCP Exam: Tablespaces, Privileges, and RMAN Backup Explained

This article walks through three common Oracle OCP exam questions—distinguishing permanent, temporary, and UNDO tablespaces, choosing the correct object versus system privilege syntax, and selecting the safest RMAN command for a hot backup—providing detailed explanations and the correct answers.

OCPOraclePrivileges
0 likes · 6 min read
Master Oracle OCP Exam: Tablespaces, Privileges, and RMAN Backup Explained
IT Xianyu
IT Xianyu
Jul 29, 2025 · Databases

Master PostgreSQL Transactions in DataGrip: BEGIN, COMMIT, ROLLBACK Explained

Learn how to safely manage PostgreSQL transactions using DataGrip by understanding ACID principles, executing BEGIN, COMMIT, and ROLLBACK commands, handling errors, and applying practical tips for visibility, connection loss, and Docker deployments, all illustrated with step‑by‑step screenshots.

ACIDBEGINCommit
0 likes · 9 min read
Master PostgreSQL Transactions in DataGrip: BEGIN, COMMIT, ROLLBACK Explained