Need some filter help. Pseudocode:
<$vars value={{foo!!value}}>
filter=Among all tiddlers with an id field, if there is no tiddler with
id:<value> then do X but if there is a tiddler with id:<value> then do
nothing
</$vars>
I assume it is some kind of then ... else construct but I can't quite
materialize it and I'm getting confused by how I loose the tiddler titles
if I look at their field values. Maybe I need something with the subfilter
operator but I'm not sure how... ?
Thank you.
<:-)
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