Mô đun:Ns has subpages

-- This module implements [[Template:Ns has subpages]].-- While the template is fairly simple, this information is made available to-- Lua directly, so using a module means that we don't have to update the-- template as new namespaces are added.local p = {}function p._main(ns, frame)	-- Get the current namespace if we were not passed one.	if not ns then		ns = mw.title.getCurrentTitle().namespace	end	-- Look up the namespace table from mw.site.namespaces. This should work	-- for a majority of cases.	local nsTable = mw.site.namespaces[ns]	-- Try using string matching to get the namespace from page names.	-- Do a quick and dirty bad title check to try and make sure we do the same	-- thing as {{NAMESPACE}} in most cases.	if not nsTable and type(ns) == 'string' and not ns:find('[<>|%[%]{}]') then		local nsStripped = ns:gsub('^[_%s]*:', '')		nsStripped = nsStripped:gsub(':.*$', '')		nsTable = mw.site.namespaces[nsStripped]	end	-- If we still have no match then try the {{NAMESPACE}} parser function,	-- which should catch the remainder of cases. Don't use a mw.title object,	-- as this would increment the expensive function count for each new page	-- tested.	if not nsTable then		frame = frame or mw.getCurrentFrame()		local nsProcessed = frame:callParserFunction('NAMESPACE', ns)		nsTable = nsProcessed and mw.site.namespaces[nsProcessed]	end		return nsTable and nsTable.hasSubpagesendfunction p.main(frame)	local ns = frame:getParent().args[1]	if ns then		ns = ns:match('^%s*(.-)%s*$') -- trim whitespace		ns = tonumber(ns) or ns	end	local hasSubpages = p._main(ns, frame)	return hasSubpages and 'yes' or ''endreturn p