< > BotCompany Repo | #1008665 // selectRandom2 - select n random elements from list (in random order, no duplicates), return rest list also

JavaX fragment (include)

// returns selected, rest
static <A> Pair<L<A>> selectRandom2(L<A> list, int n) {
  if (l(list) < n) null;
  new L<A> l;
  list = cloneList(list);
  repeat n {
    int i = rand(l(list));
    l.add(list.get(i));
    list.remove(i);
  }
  ret pair(l, list);
}

Author comment

Began life as a copy of #1002448

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