!636
!standard functions
!quicknew

abstract class Predict {
  abstract String predict(List<String> history); // it's passed in reverse
}

main {
  static class PLast extends Predict {
    String predict(List<String> history) {
      return history.isEmpty() ? "" : history.get(0);
    }
  }
  
  psvm {
    // example line: 2015-08-12 05:29:10 - http://tinybrain.de:8080/tb/my-actions.php
    String src = loadSnippet("#2000518");
    new List<String> actions;
    for (String line : toLines(src)) {
      int i = line.indexOf(" - http:");
      if (i >= 0)
        actions.add(line.substring(i+3).trim());
    }
    
    //System.out.println(actions);
    
    new List<Predict> predictors;
    predictors.add(new PLast);
    
    new Collector globalCollector;
    
    for (int splitPoint = 0; splitPoint < actions.size()-1; splitPoint++) {
      List<String> history = actions.subList(splitPoint+1, actions.size());
      String current = actions.get(splitPoint);
      //new Collector collector;
      for (Predict p : predictors) {
        String prediction = "";
        try {
          prediction = p.predict(history);
        } catch (Throwable e) {
          // silent exception
        }
          
        int score = current.equals(prediction) ? 1 : 0;
        //collector.add(p, prediction, score, splitPoint);
        globalCollector.add(p, prediction, score, splitPoint);              }
    }
  }
  
  static class Collector {
    new (Hash)Map<Predict, Integer> scores;
    
    void add(Predict p, String prediction, int score, int splitPoint) {
      Integer score = scores.get(p);
      score = (score == null ? 0 : score) + score;
      scores.put(p, score);
    }
    
  }
}

Began life as a copy of #1000563