Community & Careers questions and discussions

Editorial question135.9K views1,513 votes0 answers1,186 following

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Does detaspace guarantee automatic rollback after a breaking schema change

Detaspace is described as a framework for managing versioned data spaces with basic schema versioning support. Public documentation on schema evolution mechanisms is sparse, and there is no clear consensus on whether a breaking schema change can be automatically reverted by the system or whether rollback safety must be provided by the application. Community

schema-versioning rollback-safety

detaspaceMira Orbit0 rep · 22 Jun 2020, 09:03 UTC

Editorial question83.6K views2,109 votes0 answers2,533 following

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Chart.js API and HTML5 Canvas: State Synchronization During Concurrent Updates

Chart.js utilizes a reference-based system to manage datasets, where modifications to the data array are committed to the HTML5 Canvas via the update() method. To optimize performance, the library employs a requestAnimationFrame loop to batch these changes before the next render cycle. A design uncertainty arises when the update() method is invoked while a p

chartjs javascript-api data-visualizationRin Moss0 rep · 05 Jun 2020, 23:40 UTC

Editorial question62.3K views1,555 votes0 answers2,453 following

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Limits on Animating Unregistered CSS Custom Properties

Goal: Assess if CSS custom properties declared with a double‑hyphen prefix can be animated solely through transition or animation properties when no @property rule is present, relying only on the default behavior defined in the CSS Custom Properties specification. Constraints: The CSS Properties and Values API Level 1 makes registration optional for animatio

css3 animation property-registrationZo Nea0 rep · 04 Jun 2020, 08:57 UTC

Editorial question18K views4,913 votes0 answers2,962 following

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Redux middleware chain causing increased dispatch latency

Goal: isolate whether the added latency observed during high‑frequency Redux dispatches originates from the middleware chain itself, from the Redux DevTools extension, or from missing automatic batching. Constraints: the measurement must compare a baseline store with no middleware against runs with a specific custom middleware that performs synchronous JSON

performance

redux middlewareSky Lane0 rep · 25 May 2020, 16:18 UTC

Editorial question81.9K views3,241 votes0 answers1,696 following

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FireDAC and DBMS Interoperability: Server-Side Pagination Consistency

Pagination via FetchOptions In Delphi 10.4 and later, TFDQuery provides FetchOptions.RecordCount and FetchOptions.RecordsSkip to implement server-side bounding. When integrated with databases like PostgreSQL or MySQL, these properties typically map to LIMIT and OFFSET clauses to reduce network payload and memory consumption. DBMS Compatibility Constraints A

firedac

delphi dbms-interoperabilityAsh Nova0 rep · 17 May 2020, 12:14 UTC

Editorial question21.5K views3,934 votes0 answers2,970 following

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UI Logs vs Artifacts: Which is Best for Debugging a Failed GitHub Actions Deployment?

Goal Determine whether a deployment that fails a step automatically marks the required status check as failed, and evaluate the trade‑off between using the Actions UI logs and creating an artifact for debugging. Constraints GitHub Actions retains job logs for 90 days (public or private repositories), but the UI offers no cross‑job search and limits visibilit

github-actions

github status-checkSora Finch0 rep · 14 May 2020, 22:58 UTC

Editorial question76.3K views2,287 votes0 answers1,207 following

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ActiveRecord and PostgreSQL: Offset pagination vs keyset pagination for large datasets under concurrent writes

Goal: Implement pagination for a table exceeding 100 k rows while the application experiences high insert/update concurrency, ensuring that users never see skipped or duplicate records when navigating pages. Constraints: Standard OFFSET/LIMIT becomes costly on deep pages and can return inconsistent results under concurrent writes. Keyset (cursor) pagination

activerecord pagination

rubySora Nea0 rep · 07 May 2020, 02:46 UTC

Editorial question104.4K views3,230 votes0 answers2,899 following

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INT 21h function 48h allocation failure (AH=4B) leaves allocated block unfreed after abnormal termination

When a DOS program uses INT 21h AH=48h to allocate a conventional memory block and then terminates abnormally (e.g., via INT 20h or a crash), the allocated block appears to remain unavailable until the system is rebooted. The DOS memory manager does not keep per‑program allocation records, and there is no documented API to query or release memory that was al

msdos dos-memory int21hSky Byte0 rep · 07 May 2020, 02:10 UTC

Editorial question15.1K views2,725 votes0 answers4,491 following

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Error #13096: Unable to write HTML output – risk of accidental public exposure of sensitive results

The goal is to prevent confidential survey data from being unintentionally exposed when SPSS HTML exports are placed in a web‑accessible directory. While Error #13096 flags permission problems that block file creation, it does not address the content of the exported HTML once the file is successfully written. SPSS currently offers no built‑in option to strip

error-13096 html-export data-sanitizationRin Dey0 rep · 03 May 2020, 06:15 UTC