You are misunderstanding the purpose of :filter. It is used to include or exclude titles from the previous run, based on whether this filter run returns a result or not. The same principle as the filter[] operator for which I recommend reading the docs as they mostly apply here too: https://tiddlywiki.com/#filter%20Operator
> <$list filter="[<tempTid>get[text]] :filter[get[url]]"> > > The first filter run says: get the text field from the tiddler whose title is in the variable tempTid The second filter run says: exclude all titles from the previous run, if they do not have url field. :filter does NOT change the input titles, it only excludes or includes them in its output based on the result of its filter run. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/4b32cfe5-d3d6-4053-918e-e833bf8c46ban%40googlegroups.com.

