Hello... Perl lovers (one of which I am seeking to be)....I have the following script but it is returning errors..Here is the script:

use strict;
use warnings;
use File::Copy 'move';

# Determine destination folder for file based on filename.
# All destinations are below a fallback destination provided as input.
sub make_dest_finder {
    my $fallback_dest = shift;
    return sub {
        my $fnam = shift;
        # Determine basename to start looking for a destination folder
+.
        my $basename = substr $fnam, 0, rindex $fnam, '.';
        # Shorten name while no homonymous folder exists.
        chop $basename while $basename && ! -d "$fallback_dest/$basena
+me";
        return "$fallback_dest/$basename" if $basename;
        return  $fallback_dest;
    };
}

my $srcdir      = "/tmp/folder";
my $dest_finder = make_dest_finder '/tmp/folder2';

opendir my $dh, $srcdir or die "Can't open $srcdir: $!";
my @files = grep ! /^\.+$/, readdir $dh;
close $dh;

my $moved = 0;
foreach my $file (@files) {
    my $old = "$srcdir/$file";
    my $dest = $dest_finder->( $file );
    print STDERR "moving $file to $dest\n";
    if ( ! move $old, $dest ) {
        warn "Move $old -> $dest failed: $!";
        last;
    }
    $moved++;
}
print STDERR "\n\n- moved $moved files\n";
[download]

The error states that "Can't open /tmp/folder: Not a directory at movingfilesscript.pl line 23" Can anyone please help a newbie... And let me apologize if this is not the right forum or if in some way, I have disrespect the rules of the forum... This is literally my first post ...