Add new values to HashMap?
I am just wondering if anyone has encountered adding a new item to a HashMap? If for example i previously added 2 items to HashMap HM1, when i try to execute HM1.put(abc,123) to appended, it can't work. All of these are done in the same page but in different function calls. However, i managed to get the old value of HM1 via a session. So that's no issue here in terms of retrieving the HM1 from the session. Any thoughts? Thanks