Position argument added for GetCodepoint, GetCodepointNext and GetCodepointPrevious.

examples/resources/lib/pubsub.lua

@@ -13,21 +13,33 @@ function PubSub:add( name )
 	self.signals[ name ] = {}
 end
 
+function PubSub:remove( name )
+	if self.signals[ name ] ~= nil then
+		table.remove( self.signals, name )
+	end
+end
+
 function PubSub:subscribe( name, func )
-	table.insert( self.signals[ name ], func )
+	if self.signals[ name ] ~= nil then
+		table.insert( self.signals[ name ], func )
+	end
 end
 
 function PubSub:unSubscribe( name, uFunc )
-	for i, func in ipairs( self.signals[ name ] ) do
-		if func == uFunc then
-			table.remove( self.signals[ name ], i )
+	if self.signals[ name ] ~= nil then
+		for i, func in ipairs( self.signals[ name ] ) do
+			if func == uFunc then
+				table.remove( self.signals[ name ], i )
+			end
 		end
 	end
 end
 
 function PubSub:publish( name, ... )
-	for _, func in ipairs( self.signals[ name ] ) do
-		func( ... )
+	if self.signals[ name ] ~= nil then
+		for _, func in ipairs( self.signals[ name ] ) do
+			func( ... )
+		end
 	end
 end