prosody
a82268d507fc
util/set.lua

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util/set.lua @ 1030:a82268d507fc

util.set: Add set.xor() to get a set consisting of items not in both sets
author Matthew Wild <mwild1@gmail.com>
date Wed, 22 Apr 2009 18:03:42 +0100
parent 1029:4ead03974759
child 1522:569d58d21612
line wrap: on
line diff
--- a/util/set.lua	Wed Apr 22 18:03:02 2009 +0100
+++ b/util/set.lua	Wed Apr 22 18:03:42 2009 +0100
@@ -141,4 +141,8 @@
 	return set;
 end
 
+function xor(set1, set2)
+	return union(set1, set2) - intersection(set1, set2);
+end
+
 return _M;