in reply to Using Perl for directory listing

If you have the file's path, you can use -s to get its size: 
my $size = -s $item;

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If you need more details, use stat.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Seekers of Perl Wisdom