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Sunday, 6 September 2026 Reading Room

Tech

Open-source tool: Practical experience in converting large quantities of SQL code syntax : 'PIVOT' function rewrite (Case 1)

Background : In migration projects involving different databases, incompatibility of SQL syntax is often encountered. Question : If there is a large amount of code that needs to be rewritten, manual processing would be time-consuming and prone to errors. Is it possible to achieve automatic conversion of code syntax in large quantities through tools? Solution : The open-source tool ZGLanguage can…

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99.7% Rejected in 84ms: Why I Stopped Making the Generator Smarter

I wrote a puzzle generator whose acceptance rate is 0.26% . It throws away 99.7% of everything it produces, and that is the design working as intended, not failing.

  • 99.7% rejection rate means only 0.26% of puzzles accepted
  • Generator produces plausible letter combinations, verifier checks solutions
  • Verifier's exhaustive search and unique solution guarantee maintain rejection rates

·dev.to

Returning RFC 9457 Problem Details from Go Validation Errors

How to turn struct-tag validation failures into a standard "application/problem+json" response — the RFC 9457 format — with one method call, no hand-rolled error envelope.

  • Checker provides RFC 9457 format response for Go validation errors
  • CheckErrors.ProblemDetails() generates application/problem+json body
  • CheckStruct() method converts validation errors to properly formatted response

·dev.to

Catch Bad Validation Tags at Compile Time with checkerlint

Struct tags are just strings — a typo'd checker name, a wrong-typed field, or a renamed cross-field target all compile fine and fail silently at runtime. checkerlint catches all three before you ship.

  • Checkerlint tool checks struct tags at build/lint time
  • Detects unknown checker names, type incompatibility, cross-field targets
  • Prevents runtime errors caused by invalid struct tags

·dev.to

Exit code 0 is a lie: 7 ways my unattended automation silently did nothing

I run about thirty scheduled jobs on a single Windows box. Some are scrapers, some generate content, some are trading bots, some just check that the other jobs are alive.

  • Exit code 0 does not reliably indicate success
  • Unattended automation reported success for every failure
  • Seven specific ways automation silently failed

·dev.to

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