--- a/util/array.lua	Fri Dec 09 11:44:00 2011 +0500
+++ b/util/array.lua	Fri Dec 09 11:57:14 2011 +0500
@@ -105,6 +105,7 @@
 
 function array_methods:push(x)
 	table.insert(self, x);
+	return self;
 end
 
 function array_methods:pop(x)