Hi Beth,

Firstly, thank you so much for your really helpful reply.
I am using O'REILLY Learning Perl as my guide and reference book. However, hash of hashses and autovivification isn't in the book, which was why I got stuck
And honestly, i am not an IT student and I am self learning perl. I need to use this for some of my research work related to genetics.

Cheers

In reply to Re^2: How to add values of hash by reading from different text files by faozhi
in thread How to add values of hash by reading from different text files by faozhi

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