Duck Cloud Blog
Tutorials, SEO-friendly explainers, and step-by-step articles that link directly to the tools they describe.
Software Engineering
Understand order-dependent floating-point sums, test cancellation with a reproducible example, and choose an accuracy or reproducibility policy deliberately.
Oct 19, 2026
Read nowAI Engineering
Calculate search-and-fetch costs per useful AI answer, account for empty results and retries, and prepare for DeepSeek’s November 2026 billing change.
Oct 19, 2026
Read nowSoftware Engineering
Choose transaction or session advisory locks deliberately, test contention through the real pool, and avoid false exactly-once claims for external job effects.
Oct 19, 2026
Read nowSoftware Engineering
Check SQLite foreign-key enforcement on every connection, detect existing orphan rows and test transaction boundaries before relying on declared references.
Oct 19, 2026
Read nowSoftware Engineering
Fix missing or stale Git submodules in CI by separating parent gitlinks, local checkouts and remote access, then verifying the exact pinned commit.
Oct 19, 2026
Read nowSecurity
Review HTTP request boundaries across proxies and origins with strict framing policy, harmless test cases and connection-level checks in authorized staging.
Oct 19, 2026
Read nowSecurity
Review TLS 1.3 early-data routes for replay effects, including hidden GET side effects, distributed replay state and safe fallback to a normal handshake.
Oct 19, 2026
Read nowInfrastructure
Prepare a travel eSIM without confusing data access with calls or SMS. Check device support, roaming exposure and a practical arrival-and-return test plan.
Oct 19, 2026
Read nowTechnology Business
Distinguish kW demand from kWh energy, reproduce a peak-interval charge and assess load-shifting ideas against the actual business electricity tariff.
Oct 19, 2026
Read nowTechnology Business
Compare FIFO and periodic weighted-average inventory costs with one reconciled example, then separate accounting margin from cash and physical stock flow.
Oct 19, 2026
Read nowTechnology Business
Model an option-pool top-up with a clear fully diluted denominator, compare pre-money and post-money treatment, and check every cap-table percentage.
Oct 19, 2026
Read nowTechnology Business
Audit SaaS seats without deleting necessary access: reconcile contracts, assigned licenses, useful activity and renewal terms before claiming savings.
Oct 19, 2026
Read now