def nonempty_keys

cswap-bend-cli@0.1.0.0 · importu.bend:207

import Base
import cswap-bend-cli@0.1.0.0/json.bend as Json

207def nonempty_keys(ks: List<&2, String>, o: Json.Json) -> Result<&2, &2, String, Json.Json>:
208  match ks:
209    case Nil{}:
210      Fail{"usage carries no windows"}
211    case Con{h, t}:
212      Done{o}