in reply to Question about alternative to File::Find

I don't have your blanket aversion to the use of globals -- they are just another tool in the toolbox, applicable for some purposes and not others -- but if I did, I'd deal with it this way: 

sub buildFileHash {
    my $root = shift;
    my %filesBySize;
    find {
        ...
        push @{ $filesBySize{ -s() } } }, $File::Find::name;
        ...
    } $root;
    \%fileBySize;
}

[download]
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong

In Section Seekers of Perl Wisdom