FA-65668 / Ecological population dynamics / Member archive

Insect degree-day accumulation with horizontal cutoff: day numbering · case 03

Emergence days are reported zero-based.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Daily max is capped at upper; daily min is raised to base and capped at upper; DD = max(0, mean - base); emergence day is the first 1-based day with cumulative DD >= target; return [cumulative rounded 2, day or None]; None when upper <= base.

Why this case matters

Population projections set harvest quotas, conservation status and pest-control timing; a wrong update order, boundary or rate conversion silently changes management advice.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: spring warming codling moth	`[[2.5, 6.5, 11.5, 18.5, 27.5, 39.5], 4]`	`[[2.5, 6.5, 11.5, 18.5, 27.5, 39.5], 5]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.