I'm trying to understand filters by comparing them to boolean logic. Given three tags A B and C
Then a filter that finds A is "[tag[A]]" B OR C is "[tag[B]] [tag[C]]" A AND B is "[tag[A]tag[B]]" A and (B or C) has to be rewritten as (A and B) or (A and C) and is "[tag[A]tag[B]] [tag[A]tag[C]]" Which in a strange way reminds me of horn clauses in Prolog where I'd write: ``` filter(a, b) :- ... filter(a, c) :- .. ``` So really these filter expressions are equivalent to queries in predicate logic. (which is why they are so powerful :-) Cheers /Joe -- You received this message because you are subscribed to the Google Groups "TiddlyWikiDev" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywikidev+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywikidev@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywikidev. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywikidev/9b8edbb1-8657-4502-ba5e-c867651203a4%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
