what the--?! bloody hell, it posted it . . . *grumbles* ok, apparently i accidentally wrote a reply to my post instead of actually posting it and then replying, my bad . . . uhh, that is a reply to this:
ok, this should be roughly like what i used. unfortunately, when my other computer died, it took all my files with it, so i don't have the actual script i used. but in tested, this one makes the same mistake. fortunately, i now have two 40GB hds, so i actually have room for back up. :)
use strict;
open(PLAYLIST, "<test.m3u");
my $dir = 'c:\my files';
opendir(FILES, "$dir");
open (TEST, ">test.txt");
my %playlist;
my @filelist = grep {/\.mp3$/} readdir FILES;
my $song;
while(<PLAYLIST>) {
chomp;
if(not(/#/)) {$playlist{$_} = 1}
}
foreach $song(@filelist) {
if(!exists $playlist{$song}) {
print TEST $dir . "\\" . $song . "\n"
}
}
closedir FILES;
close PLAYLIST;
btw, it's kinda been awhile since i used perl, and i don't remember exactly what {$playlist{$_} = 1} does, or how it does it. could someone refresh my memory? yeah, i know, i really should start commenting things | [reply]
[d/l]
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Regarding the question: what does {$playlist{$_} = 1 do: In a while(<PLAYLIST>) loop like yours, $_ contains the current record, so the statement you are wondering about sets a value of 1 in the hash for the current record.
One reason I can see why this would fail is if you have trailing spaces in your input file, because e.g.'cool_song.mp3 ' is not the same as 'cool_song.mp3', which is what you will get from readdir. So this is how I would code the loop to avoid this:
while (<PLAYLIST>) {
s/#.*//g; #delete comments
s/(^\s*|\s*$)//g; #delete leading and trailing spaces
$playlist{$_} = 1 if /\.mp3$/;
}
To tell exactly what failed, of course, I would have to see also the input file.
Don't be discouraged, be cautious - we all deleted precious files some time or other.
pike | [reply]
[d/l]
[select] |
