M101JS :: HOMEWORK 2.2 in CoffeeScript

gistfile1.coffee

express   = require 'express'
app       = express()
mongo     = require 'mongodb'

mongo.connect 'mongodb://127.0.0.1/weather', (err, db) ->

  cusror = db.collection('data').find().sort("State": 1, "Temperature": -1);

  state = ''
  operator = {'$set':{'month_high':true}}

  cusror.each (err, doc) ->
    if doc == null
      return db.close()
    else if doc.State != state
      state = doc.State

      db.collection('data').update {'_id': doc._id}, operator, (err, updated) ->
        console.log('updated')

app.listen('8080')
console.log('started at 8080')