     deactivateBus.push('dispose')
 
   itemsProp = Bacon.update [],
-    [addItemsStream], (items, newItem) ->
-      items.concat(newItem)
+    [addItemsStream], concatNewItem
     [removeItemsStream], (items, {relPath}) ->
       items.filter (item) ->
         item.relPath isnt relPath

columns = require './columns'
R       = require 'ramda'

# @param {Stream} watchedProjectsStream objects containing a path {String} and a task {Task}
# @param {Stream} removedStream paths that are removed
# @return {Property} array of projects
createProjectsProp = (watchedProjectsStream, removedStream) ->
  Bacon.update [],
    [watchedProjectsStream], R.flip(R.invoker(1, 'concat'))
    [removedStream], (projects, removedPath) ->
      equalsRemovedPath = R.propEq('path', removedPath)
      removedProject = R.find(equalsRemovedPath, projects)

        task.send('dispose')
      return Bacon.noMore


  addItemsStream = watchedProjectsStream.flatMap ({task}) ->
    Bacon.fromEvent(task, 'add')
  removeItemsStream = watchedProjectsStream.flatMap ({task}) ->
