Software `/` code `/` prosody

Changeset

1029:4ead03974759

util.set: Add set:empty() to discover if the set is the empty set

author Matthew Wild <mwild1@gmail.com>

date Wed, 22 Apr 2009 18:03:02 +0100

parents 1028:594a07e753a0

children 1030:a82268d507fc

files util/set.lua

diffstat

1 files changed, 4 insertions(+), 0 deletions(-) [+]

line wrap: on

line diff

--- a/util/set.lua	Wed Apr 22 18:00:45 2009 +0100
+++ b/util/set.lua	Wed Apr 22 18:03:02 2009 +0100
@@ -91,6 +91,10 @@
 		end
 	end
 	
+	function set:empty()
+		return not next(items);
+	end
+	
 	if list then
 		set:add_list(list);
 	end