Plan.once: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/doctor/plan.bend as Plan
Lines 398-404 of ezx@1.11.0.0/src/doctor/plan.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/doctor/plan.bend&start_line=398&end_line=404

import Base

# every string of a list once, each where it last stands
def once(ss: List<&2, String>) -> List<&2, String>:
  match ss:
    case []:
      []
    case +h <> +t:
      once.put(has(t, h), h, once(t))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/doctor/plan.bend&name=has
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/doctor/plan.bend&name=once.put