Idempotent Rails Requests with a Redis Semaphore Lock
How to stop duplicate Rails requests from creating the same record twice, using a Redis-backed semaphore lock instead of chasing a race condition.
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Timezone Bugs in Ruby: BST vs UTC in CI and Cron
How British Summer Time breaks Ruby tests, cron schedules, and cloud functions that assume UTC, and how to write timezone-aware specs instead.
Code Review Anti-Patterns That Waste the Most Time
The code review anti-patterns that slow teams down most: giant PRs, style-war comments, and reviews that skip the business context entirely.
Redis Sentinel Split-Brain: Fixing It on Kubernetes
How Redis Sentinel split-brain happens during Kubernetes node maintenance, and the sentinel tuning, anti-affinity, and PDB changes that stopped it.
Xiaomi "No Signal": Dialer Codes to ADB Logs
How to debug a "No Signal" or "No SIM" error on a Xiaomi phone, from dialer diagnostic codes through ADB logcat filters to EFS partition failures.
Zsh Command-Line Editing: Shortcuts Worth Learning
A practical rundown of Zsh command-line editing: ZLE widgets, history reuse, globbing, and the handful of plugins that actually save keystrokes.
编程方法论中的“矛盾”：权衡的艺术 (Ruby 示例)
本文用 Ruby 代码示例，剖析 DRY 与 AHA、YAGNI 与可扩展性设计、继承与组合等几对看似冲突的编程原则，说明该如何在实践中权衡取舍。
Build and Push Docker Images to Quay.io with GitHub Actions
A working GitHub Actions workflow that builds a Docker image and pushes it to Quay.io using a scoped robot account and repository secrets.
Debugging Transaction Deadlocks in Rails Tests: A Case Study
A Rails test suite hung intermittently until transactional tests, ActiveJob, and ActiveStorage turned out to be racing over the same locked rows.
Monkey-Patching in PHP vs Ruby: Why One Is an Anti-Pattern
Runtime method overrides work very differently in PHP and Ruby: one has no rollback mechanism, the other builds aliasing and scoping in from the start.