FA-97663 / Knitting and sewing pattern grading / Member archive

Stranded colorwork float checker: round wrap merge · case 03

In the round, a float crossing the beginning of round is reported as two short floats.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

row is a string of color letters. For each color, a float is a maximal run of other colors [start, length]. In the round, a float touching both the end and the start (with at least two runs) wraps and merges into the last run (its start is kept). Report [color, start, length] for floats longer than max_float, sorted by (start, color).

Why this case matters

Stranded knitting charts are checked for long floats that need catching.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
wrap in round	`[["B", 2, 5]]`	`[["B", 2, 5], ["A", 7, 5]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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