Tutorials, guides, and how-tos on programming, data analytics & AI tools.
ChatGPT can scaffold rate limiting middleware in minutes, but the default output skips distributed counters, race conditions, and bypass vectors that will bite you in production. Here's how to prompt your way to middleware that actually holds up.
ChatGPT frequently generates Kubernetes manifests with deprecated apiVersions that will fail on modern clusters. Learn the exact prompting patterns that force it to produce valid, current manifests every time.
N+1 query bugs in Django serializers can silently turn a fast endpoint into a database-hammering bottleneck. Learn how to detect them with django-debug-toolbar and nplusone, then fix them permanently with select_related and prefetch_related.
PostgreSQL 12 changed how CTEs are handled, and the difference between materialized and inlined CTEs can silently kill your query performance. Here's how to diagnose the problem and fix it with one keyword.
ChatGPT can generate Nginx configs fast, but a single misplaced location block or wrong proxy_pass value silently breaks routing. Here's how to prompt it precisely and validate what comes back.
AI agents can scaffold an entire feature in minutes, which feels like magic until it ships. Here's where vibe coding quietly falls apart in real production systems and what to do about it.
ChatGPT can scaffold WebSocket handlers fast, but the default output skips reconnection logic, drops messages during disconnects, and ignores backpressure entirely. Here's how to prompt your way to production-ready code.
Sending a 50,000-token codebase to an LLM for review is easy. Getting back actionable, accurate feedback is another story. Here's how Mistral Large 2 and Claude 3.5 Sonnet actually perform when the context window fills up.
xlsxwriter silently drops or corrupts hyperlinks when the display text exceeds 255 characters. Learn exactly why this limit exists, how to detect it, and three practical workarounds you can ship today.
Merging multiple sheets into one with xlsxwriter and ending up with headers sprinkled throughout your data? Here's exactly why that happens and how to write the merge loop that gets it right every time.
Writing datetime objects with xlsxwriter and getting ugly floats like 45123.708333 instead of a readable date? Here's why it happens, what the format object actually does, and how to fix it for good.
You set up data validation dropdowns in xlsxwriter, added sheet protection, opened the file in Excel — and the dropdowns are gone. Here's exactly why that happens and how to fix it without losing your protection settings.