Thanks. This worked for me now. On the side note. How can I implement object oriented concept (encapsulation) in this same scenario?
e.g. if I want to do following.
-> sub Initialize
read config file and construct hash and return self object
sub get_value(string parameter, string key)
parameter, key, value, id
abc, xyz, 1, 100
blue, pqr, 0.1, 101
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