Create/Update/Delete object with Core Data
How can I create/update/delete objects with Core Data to do something like this :


     id | Existing Data  |    New Data   |   Result
    ---------------------------------------------------
      0 |      foo       |       bar     |   update
      1 |     azerty     |               |   delete
      2 |                |      qwerty   |   create
      3 |     lorem      |      lorem    | do nothing                

Create/Update/Delete object with Core Data
===

How can I create/update/delete objects with Core Data to do something like this :


     id | Existing Data  |    New Data   |   Result
    ---------------------------------------------------
      0 |      foo       |       bar     |   update
      1 |     azerty     |               |   delete
      2 |                |      qwerty   |   create
      3 |     lorem      |      lorem    | do nothing                
