ScalaFutureExample.scala

  protected def getDataSet: Future[List[MarkerItem]] = {
    
    val datasets = Array(
      Future { new TrashCanDataGetter(getContext, "97cc923a-e9ee-4adc-8c3d-335567dc15d3", "area01.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "5fa14e06-018b-4851-8316-1ff324384f79", "area02.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "f40cd66c-afba-4409-9289-e677b6b8d00e", "area03.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "33b2c4c5-9870-4ee9-b280-a3a297c56a22", "area04.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "0b544701-fb47-4fa9-90f1-15b1987da0f5", "area05.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "37eac6d1-6569-43c9-9fcf-fc676417c2cd", "area06.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "46647394-d47f-4a4d-b0f0-14a60ac2aade", "area07.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "05d67de9-a034-4177-9f53-10d6f79e02cf", "area08.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "179d0fe1-ef31-4775-b9f0-c17b3adf0fbc", "area09.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "8cbb344b-83d2-4176-9abd-d84508e7dc73", "area10.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "7b955414-f460-4472-b1a8-44819f74dc86", "area11.txt").getJsonData },
      Future { new TrashCanDataGetter(getContext, "5697d81f-7c9d-43fc-a202-ae8804bbd34b", "area12.txt").getJsonData }
    )

    for {
      dataOfArea01 <- datasets(0)
      dataOfArea02 <- datasets(1)
      dataOfArea03 <- datasets(2)
      dataOfArea04 <- datasets(3)
      dataOfArea05 <- datasets(4)
      dataOfArea06 <- datasets(5)
      dataOfArea07 <- datasets(6)
      dataOfArea08 <- datasets(7)
      dataOfArea09 <- datasets(8)
      dataOfArea10 <- datasets(9)
      dataOfArea11 <- datasets(10)
      dataOfArea12 <- datasets(11)
    } yield {
      dataOfArea01 ++ dataOfArea02 ++
      dataOfArea03 ++ dataOfArea04 ++
      dataOfArea05 ++ dataOfArea06 ++
      dataOfArea07 ++ dataOfArea08 ++
      dataOfArea09 ++ dataOfArea10 ++
      dataOfArea11 ++ dataOfArea12
    }
  }