gistfile1.coffee

# Search for 'keywords' in parallel, then callback
# 'cb' with an array of the parallel results
parallelSearch = (keywords, cb) ->
  out = []
  await 
    for k,i in keywords
      search k, defer out[i]
  cb out

rankPopularity = (keywords, cb) ->
  await parallelSearch keywords, defer results
  times = for r,i in results
    last = r[r.length - 1]
    [(new Date last.created_at).getTime(), i]
  times = times.sort (a,b) -> b[0] - a[0]
  cb (keywords[tuple[1]] for tuple in times)

# Search for the most popular food and the most
# popular weather pattern in parallel.
w_list = [ "sun", "rain", "snow", "sleet" ]
f_list = [ "tacos", "burritos", "pizza", "shrooms" ]

await
  rankPopularity w_list, defer weather
  rankPopularity f_list, defer food

# If we got results for both, do a final search
if weather.length and food.length
  await search "#{weather[0]}+#{food[0]}", defer tweets
  msg = tweets[0]?.text

# Alert the results to the browser
alert if msg? then msg else "<nothing found>"