api.js.coffee

class @Api
  @request: (cities, cb) ->
    requestQueue = []
    
    for (i = 0; i++; i < cities.length)
      city = cities[i]
      requestQueue[i] = city: city, ended: false
      $.get "/city", {name: city}, fnCB(city)
    
    fnCB = (city) ->
      (responseBody) ->
        currentReq = requestQueue.indexOf (q) ->q.city = city
        currentReq.ended = true
        if _.all requestQueue, (q) -> q.ended
          results = requestQueue.map (x) -> x.population
          cb(results) 
          

Api.request "new york", "portland", (results) -> print results