How can I check if a parameter passed to a macro is blank? I have tried
\define purchased(name_id) <$list filter="[tag[Artworks]!tag[Index]!<currentTiddler>search:name_id{[<<__name_id__>>]is[blank]then[XX]}sort[title]]}>• <$link to={{!!artwork_id}}><$view field="title"/> <$view field="artwork_title"/></$link><br/></$list> \end but this does not work. If name_id is empty I want to search to look for the string XX which I know doesn't exist. bobj -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/71d799f2-e1c1-4882-a56f-499c74013adcn%40googlegroups.com.