weather.js

var MongoClient = require('mongodb').MongoClient;

MongoClient.connect('mongodb://localhost:27017/weather', function(err, db) {
  if (err) throw err;

  var query = {};
  

  var options = { 'sort' : [ ['State', 1], 
                             ['Temperature', -1] ]
                };
  
  var cursor = db.collection('weather').find(query, {}, options);

  var tempState = '';
  var topStates = [];
  var states = [];
  cursor.each( function (err, doc) {
    if (err) throw err;

    if (doc == null) {
      return db.close();
    }
    
    if (doc.State !== tempState){
      tempState = doc.State;


      doc['month_high'] = true;
      db.collection('weather').save(doc);
      console.log(doc);
    }


  });

});