tasks.js

Todos.tasksController = SC.ArrayController.create({

  countSummary: function() {
    if(this.get('length') == 0){
      return 'No Tasks';
    }else{
      if(this.get('length') == 1)
        return '1 Task';
      else
        return "%@ Tasks".fmt(this.get('length'));
    }
  }.property('length').cacheable()
});