contMap.coffee

contMap = (arr, f, g, ans) ->
  if ans is undefined then ans = []
  if arr.length is 0 and typeof g is 'function' then return g ans else return
  f.apply @, [
    arr.shift()
    (item)-> contMap arr, f, g, ans.concat([item])
    ans
  ]

# Example
contMap queries, (query, next) ->
  $.get "https://www.google.co.jp/search?q=" + query, (body) ->
    # some process with body
    next body
, (results) ->

ex:

contMap = (arr, f, g, ans) ->
  if ans is undefined then ans = []
  if arr.length is 0 then return g ans
  f.apply @, [
    arr.shift()
    (item)-> contMap arr, f, g, ans.concat([item])
    ans
  ]

contMap.apply @, [
  [1, 2, 3]
  (num, callback)->
    setTimeout ->
      callback num * num
    , 20
  (ans)-> console.log ans
]