// this is pretty bad, who needs this?
static S[] mapToStringArray(Map map) {
  new L l;
  for (O o : keys(map)) {
    l.add(o);
    l.add(map.get(o));
  }
  ret toStringArray(l);
}

// this is the good one
static <A> S[] lambdaMapLike mapToStringArray(IF1<A, S> f, Iterable<A> l) {
  ret toStringArray(map(f, l));
}

static <A> S[] mapToStringArray(Iterable<A> l, IF1<A, S> f) {
  ret mapToStringArray(f, l);
}