bcquality/microsoft/knowledge/performance/use-findset-with-next.md
Jesper Schulz-Wedde 62dabf9a11 Co-locate AL samples next to their knowledge articles
The /samples/ top-level tree is replaced with sibling files in each
knowledge-layer folder. An article and its demonstrations now live
side-by-side:

  microsoft/knowledge/<domain>/<slug>.md
  microsoft/knowledge/<domain>/<slug>.good.al
  microsoft/knowledge/<domain>/<slug>.bad.al

Rationale:
- Proximity. An article and its paired samples are one unit; the
  filesystem now reflects that.
- Layer ownership. Samples inherit layer precedence for free -- a
  /custom/ fork can override an article and its samples atomically,
  which the shared /samples/ tree previously made awkward.
- Trivial migration path. Action-skill source globs
  (*/knowledge/<domain>/**/*.md) are unchanged; sample discovery is a
  sibling-filename lookup.

Changes:
- git mv of all 65 sample files from samples/<domain>/<slug>/{bad,good}.al
  to microsoft/knowledge/<domain>/<slug>.{bad,good}.al (history preserved).
- Update See-sample references in all 37 articles that ship samples.
- skills/read.md: replace the no-code-blocks bullet with a pointer to a
  new Sample files section that fully specifies the sibling convention,
  the kinds (good/bad + forward-compatible), multi-technology rules,
  demonstration-only status, and layer-precedence behaviour.
- skills/write.md: update the samples pointer to match.
- README.md: annotate the knowledge tree with the sample sibling shape.
- samples/README.md deleted; content lifted into skills/read.md.
- Both generators (C:\temp\gen_performance_knowledge.py,
  C:\temp\gen_security_knowledge.py) updated to emit at the new paths
  and to stop writing samples/README.md. Re-running them is idempotent
  against the committed layout.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-04-17 13:45:33 +02:00

29 lines
1.2 KiB
Markdown

---
bc-version: [26..28]
domain: performance
keywords: [findset, next, repeat, iteration, aa0181]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Use FindSet with Next for iteration
> **Seed article.** Converted from an existing performance-review prompt to bootstrap the BCQuality performance corpus. Domain stewards should expand, restructure, and refine as needed.
## Description
When iterating over a filtered set of records with repeat-until, use FindSet together with Next. CodeCop rule AA0181 requires FindSet or Find to be paired with Next; using FindFirst or FindLast as the loop starter misrepresents intent and leads to rule AA0233.
## Best Practice
Call FindSet to start the iteration and Next to advance. Guard the loop with the standard `if FindSet() then ... until Next() = 0` idiom so callers can still handle the empty-set case.
See sample: `use-findset-with-next.good.al`.
## Anti Pattern
Starting a repeat-until loop with FindFirst or FindLast reads only one row and then calls Next on an iterator that was not intended for full-set traversal. The platform pays extra work to fetch the single row and the loop silhouette is misleading to reviewers.
See sample: `use-findset-with-next.bad.al`.