you could shorten 
$saved_info = $fileinfo{$_} ||= [];
push @$saved_info,\@filedata;

[download]
to 
push @{ $fileinfo{$_} }, \@filedata;

[download]
beacause the arrayref will be autovivified if it didn't already exist.

In reply to Re^2: data structure advice please by Arunbear
in thread data structure advice please by anadem

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