 
   resetList:->
 
-    lastFrom = null
-    lastTo   = null
+    delete @lastTo   = null
+    delete @lastFrom = null
+
     @listController.removeAllItems()
 
   setFilter:(type) -> @currentFilter = if type? then [type] else activityTypes

  extractTeasersTimeStamps:(teasers)->

    teasers  = _.compact(teasers)
    lastTo   = teasers.first.meta.createdAt
    lastFrom = teasers.last.meta.createdAt

  # Store first & last cache activity timestamp.
  extractCacheTimeStamps: (cache)->

    lastTo   = cache.to
    lastFrom = cache.from

  populateActivity:(options = {})->

    return if isLoading
    isLoading = yes
    @listController.showLazyLoader()
    @listController.noActivityItem.hide()


        options = to : options.to or Date.now()

        @fetchActivity options, (err, teasers)=>
          @isLoading = no
          @listController.hideLazyLoader()
          if err or teasers.length is 0
            warn err
