Well, stressed of coding with google search, understanding working of perl language is fun.

I've decided to use hash table and parsing %$hash_ref into while loop search for column2 repetitive values. Next use for loop to create a loop until every repetitive value is parsed and concatenated to existing outfile. Next, start iteration to find other repetitive word from column2 (values).

Good part is Learning Perl with Monks feedback makes Perl easy.

In reply to Re: read hash table from a subroutine or retrieve previously stored hash table from a file by waytoperl
in thread read hash table from a subroutine or retrieve previously stored hash table from a file by waytoperl

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