Orc vs Promises 1

orc.coffee

getData = ->
  xhr new XMLHttpRequest
  xhr.open 'GET', 'data', true

  handleXMLHTTPRequest = ->
    if xhr.status is not 200
      orc.fail()

  xhr.addEventListener 'load', orc.waitFor(handleXMLHTTPRequest), false
  xhr.send()

orc.sequence (-> getData(); getLocation()), (data, location) ->
  alert "We got data: #{data} and location: #{location}"

promises.coffee

getData = ->
  deferred = $.Deferred()

  xhr = new XMLHttpRequest
  xhr.open 'GET', 'data', true

  handleXMLHTTPRequest = ->
    if xhr.status is 200
      deferred.resolve xhr.response
    else
      deferred.reject "HTTP error: #{xhr.status}"),

  xhr.addEventListener 'load', handleXMLHTTPRequest, false
  xhr.send()

  deferred.promise()

combinedPromise = $.when getData(), getLocation()
combinedPromise.done (data, location) ->
  alert "We got data: #{data} and location: #{location}"

The promises example was taken from http://www.html5rocks.com/en/tutorials/async/deferred/