Swift - Append object: array index out of range -

when try add item array gives me , exc bad instruction error , says

fatal error: array index out of range 

that code:

var tabelle : [[actions]] = [[]]  func dosomething() {      var results = self.fetch()      var oldprojektname: string = results[0].projektname     var count: int = 0      item in results {         if oldprojektname == item.projektname {            tabelle[count].append(item)                        } else {             count++             tabelle[count].append(item)         }         oldprojektname = item.projektname     } } 

as long count = 0 not give me error when count = 1 app crashes.

you have array 1 element: var tabelle : [[actions]] = [[]] why tabelle[0] working.

you need append array tabelle before can use tabelle[1]