a keyup debouncing directive, needs to be decaffeinated

onDelayedKeyup.coffee

@App.directive "onDelayedKeyup", ['$timeout', ($timeout) ->
  (scope, element, attrs) ->
    timer = false
    element.bind "keyup", ->
      $timeout.cancel(timer) if timer
      timer = $timeout ->
        scope.$apply attrs.onKeyup
      , 500
]