From 24c25436be754e2f7b7a92d75d9cd82fd9ea7c21 Mon Sep 17 00:00:00 2001
From: Jeremy Fincher <jemfinch@users.sourceforge.net>
Date: Tue, 1 Jun 2004 16:22:48 +0000
Subject: [PATCH] Fixed bug in announcements.

---
 plugins/RSS.py | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/plugins/RSS.py b/plugins/RSS.py
index 10d56eed5..47488a75b 100644
--- a/plugins/RSS.py
+++ b/plugins/RSS.py
@@ -159,14 +159,11 @@ class RSS(callbacks.Privmsg):
                 oldheadlines = []
             newresults = self.getFeed(url)
             newheadlines = self.getHeadlines(newresults)
-            def headlineEq(h1, h2):
-                return h1.lower().split() == h2.lower().split()
-            for (i, oldheadline) in enumerate(oldheadlines):
-                try:
-                    newheadline = newheadlines[i]
-                except IndexError:
-                    break
-                if headlineEq(oldheadline, newheadline):
+            def canonicalize(headline):
+                return tuple(headline.lower().split())
+            oldheadlines = sets.Set(map(canonicalize, oldheadlines))
+            for (i, headline) in enumerate(newheadlines):
+                if canonicalize(headline) in oldheadlines:
                     newheadlines[i] = None
             newheadlines = filter(None, newheadlines) # Removes Nones.
             if newheadlines: