EDIT: what do you mean by the "stomping"?

I'm sure others have already answers this...

I mean that your second each call is overwriting your $k2 value so your next call to each is operating on the value you replace $k2 with instead of the hashref you mean to have there.

Stomping is a colloquial expression, by which I mean to stay "accidentally replacing" or "stepping on."

-Paul

In reply to Re^3: Trying to remove duplicate rows using hashes by jettero
in thread Trying to remove duplicate rows using hashes by Angharad

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