code: public static ScoreKeeper[] scoreKeepers(ScoringInfo[] scoring_history) {
      ScoreKeeper[] sk = new ScoreKeeper[scoring_history.length];
      for (int i=0;i<sk.length;++i) {
        sk[i] = scoring_history[i].cross_validation ? scoring_history[i].scored_xval
                : scoring_history[i].validation ? scoring_history[i].scored_valid
                : scoring_history[i].scored_train;
      }
      return sk;
    }
docs: For a given array of ScoringInfo return an array of the cross-validation, validation or training ScoreKeepers, as available.