X-Git-Url: http://www.git.stargrave.org/?p=public-inbox.git;a=blobdiff_plain;f=lib%2FPublicInbox%2FNNTP.pm;h=12f74c3dd3fb24955aeec4bb16f70418615e4ebd;hp=35729f003daecc99b12826df25456815b21f0c2e;hb=ea45e9f71588572a2f4b9299a86cedc3c8e9c72a;hpb=261f705649bf5bc9c1954b29cfdb3c894cf44be2

diff --git a/lib/PublicInbox/NNTP.pm b/lib/PublicInbox/NNTP.pm
index 35729f00..12f74c3d 100644
--- a/lib/PublicInbox/NNTP.pm
+++ b/lib/PublicInbox/NNTP.pm
@@ -423,10 +423,7 @@ sub set_nntp_headers ($$$$$) {
 		$hdr->header_set('Message-ID', $mid0);
 		my @alt = $hdr->header('X-Alt-Message-ID');
 		my %seen = map { $_ => 1 } (@alt, $mid0);
-		foreach my $m (@mids) {
-			next if $seen{$m}++;
-			push @alt, $m;
-		}
+		push(@alt, grep { !$seen{$_}++ } @mids);
 		$hdr->header_set('X-Alt-Message-ID', @alt);
 	}