Survival.in_bin_count: def of unified-nsga-iii@0.2.2.0
Import: import unified-nsga-iii@0.2.2.0/survival.bend as Survival
Lines 320-327 of unified-nsga-iii@0.2.2.0/survival.bend: https://jend.leeeet.dev/read.txt?path=unified-nsga-iii@0.2.2.0/survival.bend&start_line=320&end_line=327

import Base
import unified-nsga-iii@0.2.2.0/util.bend as Util

# Assignments whose reference_index lands in a length-n histogram.
# Out-of-range refs are silent no-ops in inc_at / List.set.
def in_bin_count(asgs: List<&2, Assignment>, +n: Nat) -> Nat:
  match asgs:
    case Nil{}:
      0n
    case +a <> rest:
      Nat.add(Util.bin_hit(asg_ref(a), n), in_bin_count(rest, n))

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/survival.bend&name=Assignment
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/survival.bend&name=asg_ref
  https://jend.leeeet.dev/definition.txt?path=unified-nsga-iii@0.2.2.0/util.bend&name=bin_hit