The following works on Windows (it will not work on *nix).

It reads all entries in the SDF file into an array, after transforming the backslashes to forward slashes, and lowercase the whole shebang.

Then after we've grabbed up all *.sdf files in the specified directory, we lowercase these as well. On Windows, case is irrelevant on the file system, and this will avoid breaking exact matching if case differs.

If the file is not in the SDF file, we delete (unlink) it.

use warnings;
use strict;

use File::Find::Rule;

my $path = 'c:/sdf'; # path to look in
my $sdf_file = 'c:/sdf_file.txt';

open my $fh, '<', $sdf_file
  or die "can't open the flippin' flackin' file!: $!";

my @sdf_files;

while (<$fh>){
    chomp;

    if (my ($file) = /fullpath="(.*)"$/){
        # replace backslash to fwd slash, and lowercase
        $file =~ s|\\|/|g;
        $file = lc $file;
        push @sdf_files, $file;
    }
}

my @files = File::Find::Rule->file()
                            ->name('*.sdf')
                            ->in($path);

for my $file (@files){
    $file = lc $file;
    if (! grep {$file eq $_} @sdf_files){
        print "deleting $file\n";
        unlink $file or die $!;
    }
}

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In reply to Re: Compare 2 arrays by stevieb
in thread Compare 2 arrays by niceguy

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