Jux: remove duplicate custom_links

gistfile1.js

db.users.find({'custom_links.1': {$exists: true}}).snapshot().forEach(function(user){
  var urls = {},
    keepLinks = [];

  user.custom_links.forEach(function(link){
    var url = link.value.toString().toLowerCase().replace(/\/$/, '').replace(/^(https?:?\/\/)?(www\. ?)?/, '');
    if (!urls[url]){
      keepLinks.push(link);
      urls[url] = true;
    }
  });

  if (user.custom_links.length !== keepLinks.length){
    print(user.username + '--------------------------------------');
    printjson(urls);
    db.users.update({_id: user._id}, {$set: {custom_links: keepLinks}}, false, false);
  }
});