Snowflake count_if returns 0 if no records satisfy the condition, while the documentation states otherwise

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# Postmortem: Snowflake `COUNT_IF` Behavior vs. Documentation Discrepancy ## Summary – Snowflake’s `COUNT_IF` function returns `0` when no records meet the condition. – Official documentation claims it should return `NULL` in such cases. – Discrepancy confirmed via live testing of `COUNT_IF(1 != 1)` returning `0`. ## Root Cause – Implementation aligns with SQL’s `COUNT` aggregation … Read more

How to get an older project to Create universal binary and target Apple Silicon

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# Production Postmortem: Older Project Fails to Build Universal Binary for Apple Silicon ## Summary An Objective-C project migrated to Apple Silicon revealed compatibility issues: – Could only run under Rosetta emulation – Build system refused to target Apple Silicon (`arm64`) – Identified problematic third-party libraries (`libssl.a` and Crashlytics) – Build configuration showed `ARCHS_STANDARD` as … Read more

Can the Duan et al. 2025 “breaking the sorting barrier” faster-than-Dijkstra SSSP algorithm speed up Yamada–Kinoshita negative-cycle enumeration?

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# Can the Duan et al. 2025 “breaking the sorting barrier” faster-than-Dijkstra SSSP algorithm speed up Yamada–Kinoshita negative-cycle enumeration? ## Summary This postmortem explores whether Duan et al.’s advanced single-source shortest path (SSSP) algorithm for nonnegative weights can accelerate Yamada–Kinoshita’s method for enumerating negative cycles. Key conclusions: – Duan et al.’s algorithm cannot be directly … Read more

“UserStyleSetting has a 640 x 464 icon. This is too big” error when building Wear OS Watch Face

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Summary An error occurred during Wear OS watch face compilation: UserStyleSetting has a 640 x 464 icon. This is too big, despite confirmed icon dimensions being under the claimed limit (400×400). The root cause was redundant large-density drawable resources in obscure directories. The issue was resolved by identifying and removing oversized legacy assets from unexpected … Read more

make a Book Ordering System on visual studio code that has a clear separation between core program logic and a Tkinter graphical user interface (GUI

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# Technical Postmortem: Book Ordering System Failure Due to Tight GUI-Coupling ## Summary A Python-based book ordering system implemented with Tkinter failed core separation requirements. The solution tightly coupled business logic with UI code, resulting in: – Invalid operation prevention failures – Validation logic duplication – Untestable core functionality – Rigid architecture resistant to change … Read more

Error in country and city autocomplete google maps for USA cities

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# Autocomplete Error: USA Country Filter Returns Mexican Cities ## Summary – When users selected “United States” in a country-autocomplete field, the dependent city-autocomplete field incorrectly displayed Mexican cities – The app used Google Maps Legacy Place Autocomplete with country restriction parameters (`AutocompleteFilter`) – All tested countries (UK, France, Spain, Russia) worked correctly – error … Read more

git fetch origin master:master does not advance origin/master, but it does advance FETCH_HEAD

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Unexpected Behavior Analysis: git fetch origin master:master Does Not Update origin/master Summary Executing git fetch origin master:master failed to update origin/master despite fetching new commits The operation showed ! [rejected] master -> master (non-fast-forward) and created new tags FETCH_HEAD was successfully updated with the latest commit Running git fetch origin master later updated origin/master as … Read more

Google Sheets multiple scripts

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# Google Sheets Multiple Scripts: Resolving Conflicting `onEdit` Triggers ## Summary – Three separate functions named `onEdit` were implemented to handle spreadsheet edits – Conflicting trigger definitions caused only the final `onEdit` implementation to execute – Attempts to rename functions broke trigger registration while maintaining name collisions – Resolution required merging all logic into a … Read more

info.remote_addr() – method not found in warp::log::Info

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# `info.remote_addr()` – Method Not Found in warp::log::Info: A Production Postmortem ## Summary A compilation error occurred when using `info.remote_addr()` within `warp::log::custom`. The method `remote_addr` is absent in `warp::log::Info`, causing the Rust compiler to reject the code. The issue stems from API differences between Warp’s logging middleware and remote address extraction. ## Root Cause * … Read more