x.coffee

onClick: (e) ->
  reqs = []

  $(...).find(...).each (i, el) =>
    req = $.ajax
      url: $(el).data('path')
      success: (content) =>
        files[$(el).data('name')] = content

    reqs.push(req)

  $.when.apply(null, reqs).done =>
    finish(files)

finish: (files) =>
  console.log files