Re: Re: Re: Re: file (mp3) list shown on website as links

The docs for File::Find are ludicrously bad. The first example you ever see is:

sub wanted {
    /^\.nfs.*$/ &&
    (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
    int(-M _) > 7 &&
    unlink($_)
    ||
    ($nlink || (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_))) &&
    $dev < 0 &&
    ($File::Find::prune = 1);
}
[download]

However, if you look right at the bottom, you'll see a snippet like:

sub wanted {
  -l && !-e && print "bogus link: $File::Find::name\n";
}
[download]

which is really what you want to copy...

Tony

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Re: Re: Re: Re: Re: file (mp3) list shown on website as links by ichimunki (Priest) on Dec 31, 2000 at 18:17 UTC
I don't want to copy anything. I want to write original code that I understand. :) Can you explain what that last snippet does that we can take advantage of in this situation?	[reply]
Re: Re: Re: Re: Re: Re: file (mp3) list shown on website as links by salvadors (Pilgrim) on Dec 31, 2000 at 22:01 UTC
Ah, but the best way to learn (IMO) is to copy and tweak. Yes, it spawns a lot of cargo-cult, but not everyone has the time, the effort and the inclination to devour every word of a man page, especially poorly written ones! So, let's work at tweaking this one: `sub wanted { -l && !-e && print "bogus link: $File::Find::name\n"; }` [download] `perldoc perlfunc` will show you a list of all the file test functions available. -l means 'is a symlink' and -e means 'file exists'. What File::Find does is apply the 'wanted' sub (or any other sub-ref passed) to every file it finds (with $_ locally set as the filename, having chdir-ed to any directory it finds), so in this case it checks first of all if the file is a symlink (-l), and then if the file doesn't actually exist (-e). If this is true then it tells you that that link is broken (using $File::Find::name which is the fully qualified file name, relative to where you are) So, say we actually wanted to find all .mp3 files. We'd use something like: `sub wanted { return unless -f && /\.mp3$/; print $File::Find::name, "\n"; }` [download] Or, you could push them to an array, or whatever. Then you just call this as: `find (\&wanted, $BASEDIR)` Tony	[reply] [d/l] [select]