Do both. You never know what someone might want to do with the intermediate data, so leave the option of returning a hashref in there.

However if you know most of the time the data will be written to a file go ahead and do it. Users of your module should test with it before using it on real data anyway. If they don't is that your fault?

In reply to Re: Should Modules Do I/O? by NateTut
in thread Should Modules Do I/O? by pboin

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