Looks like you need something like the following:
use strict;
use warnings;
my @compare = (
['/dir1/contents/','/dir2/contents','^cob$'],
['/dir1/contents/','/dir2/contents','\.ffl$','\.1st$']
);
my ($dir1, $dir2, @r, $regex);
for (@compare) {
($dir1, $dir2, @r) = @$_;
# Load dir info, create hash, compare hash
# If hash doesn't match...
$regex = join '|', @r; print "$regex\n";
# Sort and run through files, ignoring ones that regex matches if
+regex exists.
# Print directory and file info for files that don't match between
+ directories
}
The duplication in your code is in having to run the same pieces of code on many different directories and file names / endings. Create a structure instead that lets you easily store this info and loop through it, and your code can be reduced to a fraction of its previous size.
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