One brute-force method is:
- Store all your paths into an array.
- Two nested loops through the array
- Create a hash of parent directories, using index.
- Loop through your hash and print just the leaf directories.
use strict;
use warnings;
my @dirs;
while (<DATA>) {
chomp;
push @dirs, $_;
}
my %parents;
for my $dir1 (@dirs) {
for my $dir (@dirs) {
if (index($dir1, $dir) == 0) {
# $dir1 is a substring of $dir, starting at pos 0
$parents{$dir}++;
}
}
}
for (keys %parents) { print "$_\n" if $parents{$_} == 1 }
__DATA__
/tmp/a
/tmp/a/b
/tmp/a/b/c
/tmp/a/b/c/e
/tmp/a/b/d
/tmp/a/b/d/g
/tmp/a/b/d/g/h
/tmp/a/b/d/g/i
/tmp/a/b/k
Prints:
/tmp/a/b/d/g/h
/tmp/a/b/d/g/i
/tmp/a/b/k
/tmp/a/b/c/e
I used this technique to solve
a similar problem. Hopefully, our fellow monks will provide a more elegant solution.