Fast way to store employee objects via zip code lookup.

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You could have your employee hashmap also have a pointer back to the correct element in the linked list of the zip code hashmap.

Alternatively, you could handle this an easier way that requires no modification to the standard hashmap libraries. As each entry comes in, assign it an auto-incremented ID (use a 64-bit integer so you don't run out of IDs). Then take the employee record and insert into a hash map that maps ID to employee record. Then have two auxillary lookups, one for name -> id and another for zip -> list of IDs. You can see that this is nicely extensible in that you can extend this to as many search criteria as you want.

- Anonymous March 26, 2015 | Flag Reply

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