Aggregating the scores by lol and associating with the name of the user who created it.

gistfile1.js

var aggregate_scores_by_lol = function(votes, lols, users){
  var vote_count = {};
  var lol_dictionary = {};

  for(var index in lols){
    var lol = lols[index];
    vote_count[lol.id] = 0;
    lol_dictionary[lol.id] = lol;
  }

  for(var vote_index in votes){
    var vote = votes[vote_index];
    vote_count[vote.lol_id] += 1;
  }

  var vote_count_keys = [];
  for(var vote_count_key in vote_count){
    vote_count_keys.push(vote_count_key);
  }

  var lol_ids = vote_count_keys;
  var sorted_lol_ids = lol_ids.sort(function(a, b){
    return vote_count[b] - vote_count[a];
  });

  var lol_scores = [];
  for(var lol_id_index in sorted_lol_ids){
    var lol_id = sorted_lol_ids[lol_id_index];
    var lol = lol_dictionary[lol_id];
    lol_scores.push({
      id: lol_id,
      score: vote_count[lol_id],
      url: lol.lol_url,
      user_id: lol.user_id,
      user_name: users[lol.user_id].name
    });
  }

  return lol_scores;
};