< > BotCompany Repo | #1021859 // getFromMultipleMapsAsCISet - get a single key from a list of maps, output ciSet

JavaX fragment (include)

static <A> Set<S> getFromMultipleMapsAsCISet(Collection<Map<A, S>> maps, A key) {
  Set<S> out = ciSet();
  if (maps != null) for (Map<A, S> map : maps)
    addIfNotNull(out, map.get(key));
  ret out;
}

Author comment

Began life as a copy of #1010807

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