What part is giving you trouble?

If I were writing this, I'd read a line, split on whitespace, and use the first two fields as keys of a hash of array references. If order matters, I'd keep another array for order of the hash keys (or maybe use something like Tie::IxHash).

Producing the right output is just a matter of a loop, a join, and a print.

In reply to Re: Combining flat file records by chromatic
in thread Combining flat file records by pglinx

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