Hi Eric, Thank you for sharing!
Looking in TW-Scripts you can find two great resources for working with filters: - Jed Carty: https://ooktech.com/jed/ExampleWikis/FilterLogicExamples/ - Tobias Beer: https://tobibeer.github.io/tw/filters/#Filter%20Examples and I alos would like to add the great interactive playground by Eric Shulman http://tiddlytools.com/filtergenerators.html These are three wonderful sources for learning filters and of course the holly TW-Scripts :-) :-) --Mohammad On Wednesday, May 6, 2020 at 3:44:52 PM UTC+4:30, Eric N. wrote: > > I was stuck in my dev > <https://groups.google.com/forum/#!topic/tiddlywiki/H90XO43PblE> because > I couldn't output the intersection of two filters, each made of several > runs. I didn't find a built-in function to do so, and I couldn't find a > satisfying solution online. But I eventually found my own solution, shared > here. > > Say I want to get all the tiddlers that satisfy the following conditions > (toy example here, could also have a pair of very complex filters): > > (has tag Todo OR starts with "a") AND (has tag Howto OR starts with "al") > > This is computed by the following code, where the output list is enlist > <setAinterB>, which is displayed by the list-links macro. > > <$set name="filterA" filter="[tag[Todo]] [all[]prefix[a]]"> > <$set name="filterB" filter="[tag[Howto]] [all[]prefix[al]]"> > <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]"> > <$set name="setAnotB" filter="[enlist<filterA>] -[enlist<filterB>]"> > <$set name="setBnotA" filter="[enlist<filterB>] -[enlist<filterA>]"> > <$set name="setAinterB" filter="[enlist<setAunionB>] -[enlist<setAnotB>] > -[enlist<setBnotA>]"> > > <<list-links "[enlist<setAinterB>sort[]]">> > > </$set> > </$set> > </$set> > </$set> > </$set> > > > *Caveat* : if a filter output contains double brackets (say a tiddler > named "oh what a [[bad]] name") it breaks the enlist processing, and you > won't have the correct output. > > > Best, > Eric > -- 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/b935517c-d1fd-4372-8553-8db5edd0f4fa%40googlegroups.com.
