I'm using File::stat to get each entry's mode. It returns lots of numbers whose meanings are a mystery to me. Where can I find out more about this? I either need to know what these mode numbers mean, or need a better way of testing for files and directories. 
opendir FOLDERS, $path or die "opendir $path - $!";
for ( grep /[a-z]/, readdir FOLDERS )
{
    my $st = stat( $path.$_ );
    my $mode = $st->mode;
    print $mode;
}
closedir FOLDERS;

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In reply to How to determine whether a dir entry is a directory? by Codmate

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