Hi.

Should this move to Obfuscated Code? :-)

perl -F: -al0ne '$i||=1;/^n/&&print$i;!/^u/&&print$F[1];/^$/&&$i++&&pr
+int$/'
[download]

I don't think it meets the "simple" requirement, but it is mostly on one line... ;-)

Here is what B::Deparse makes of it though, for reference.

LINE: while (defined($_ = <ARGV>)) {
    chomp $_;
    @F = split(/:/, $_, 0);
    $i ||= 1;
    print $i if /^n/;
    print $F[1] if not /^u/;
    print $/ if /^$/ and $i++;
}
[download]

I'm not sure if the preceeding number is a requirement or not. Without the number prefix, I can get down to:

perl '-F: ' -al0ne '!/^u/&&print qq($F[1] );/^$/&&print$/'
[download]

(To run on Win32, change all the ' into " - it should still work.)

Hope that helps.

Cheers,

-- Dave :-)

$q=[split+qr,,,q,~swmi,.$,],+s.$.Em~w^,,.,s,.,$&&$$q[pos],eg,print