My hash will have up to 1000 entries,

This is hardly relevant

so I need to read the CSV to create the %User hash.

This hardly follows from the previous remark.

I still can't understand whether you have two separate programs because you have to or just because of a circumstance. Anyway, reading from the CSV and from the file created by your poorly reinvented D::D code wouldn't make such a difference: thus do you really need that intermediate passage?

Can you give me any ideas or code samples that would show my how to do this with the code I included in my question?

Well, it can't be done with the code you included in your question. Otherwise you wouldn't be asking here. OTOH several suitable suggestions have already been given to you, perhaps you should comment them explaining why you don't find them satisfactory.

In reply to Re^3: Use of Hash For Table Lookup by blazar
in thread Use of Hash For Table Lookup by country1

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