prodopsy # Preventing Race Conditions in AWS DynamoDB with Lambda and Kinesis Pipelines ## Summary A pipeline processes DynamoDB updates via Kinesis and Lambda functions: – **Lambda A** reads items and publishes versioned events (`{key, version, …}`) to Kinesis – Kinesis partitions events by key – **Lambda B** consumes events and writes updates to DynamoDB **Problem:** … Read more
# Spatial Aliasing on Grid Lines in GLSL: A Postmortem ## Summary – Grid lines rendered with a GLSL fragment shader exhibit jagged triangular artifacts (“spatial aliasing”) – Occurs when computing grid line visibility using `mod()`, `dFdx`, and `dFdy` as distance estimators – Aliasing manifests as sawtooth patterns along grid lines when camera isn’t axis-aligned … Read more
# Postmortem: Subform RecordSource Update Failure in MS Access Production Database ## Summary A production database form stopped updating inspection questions after combobox selections. The main form (`frm_Inspections`) contained a combobox for inspection types, with a subform (`sub_Questions`) that should dynamically switch between four tables sharing identical schemas. Despite multiple attempts, the RecordSource change wasn’t … Read more
# Controller Assignment Failures in UE5 Multiplayer Fighting Game ## Summary Failure to assign distinct input devices (gamepad/keyboard) to specific characters in a 2.5D fighter resulted in both devices controlling Player 1. Implemented explicit controller-device assignment via Player Controller initialization and Enhanced Input subsystem separation. ## Root Cause – Unreal Engine’s default behavior binds all … Read more
# Postmortem: Ruff Format Collapsing Multi-Line Chained Method Calls Against Developer Intent ## Summary • Ruff formatter unexpectedly collapsed multiline chained method calls into a single line • Attempts to use `preview = true` and adjust `pyproject.toml` configuration didn’t preserve desired formatting • Behavior occurred inconsistently based on trailing comments or argument length ## Root … Read more
# Incident Analysis: Suboptimal Gemma 3 Integration Causing Latency and Context Limitations in VS Code ## Summary – Developers experienced high latency and incomplete AI context when using Gemma 3 via continue.dev + Open WebUI + Ollama – Observed 3-hop communication path (VS Code → continue.dev → Open WebUI → Ollama) – Critical missing capabilities: … Read more
# Adding a Global Group Module (Header) to a Child Theme: Why CSS Failed to Load ## Summary – A developer cloned a global header module in a HubSpot CMS child theme. – The cloned module was referenced in `base.html` via the module path. – The header displayed structurally but rendered without CSS styling. – … Read more
# How to solve Xcode error “The i386 architecture is deprecated.” ## Summary – Deprecated i386 architecture prevented macOS app release builds – Project settings contained legacy 32-bit Intel (i386) architecture references – Debug builds succeeded due to “Build Active Architectures Only” masking the issue – Resolution required manual removal of i386 from build settings … Read more
# Angular CDK Tree Expansion: Why Expanding a Node Doesn’t Automatically Expand Parents ## Summary – The Angular CDK Tree API requires manual recursive expansion of parent nodes when programmatically expanding a nested child node. – Default behavior (`MatTree.expand()`) only expands the target node, leaving ancestors unchanged. – Developers must implement custom logic to expand … Read more
# Postmortem: Incorrect Conditional Logic in Access Report Field Population ## Summary An attempt to dynamically populate an unbound text box on an Access report based on record-level conditions resulted in all records showing the same error message (“Missing General Citation”), regardless of actual field values. ## Root Cause – The conditional logic in the … Read more