Eric N Thanks for sharing, I thought I would turn it into a macro because it is a general type of solution.
\define intersect(filter1 filter2) <$set name="filterA" filter="$filter1$"> <$set name="filterB" filter="$filter2$"> <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]"> <$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></$set> \end <<intersect "[tag[Todo]] [all[]prefix[a]]" "[tag[Howto]] [all[]prefix[al]]" >> But I avoid the list-links macro because its a fixed format The following lists only tiddler titles, using the default list widget behaviour, but it easy to present things differentl \define intersect(filter1 filter2) <$set name="filterA" filter="$filter1$"> <$set name="filterB" filter="$filter2$"> <$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 filter="[enlist<setAinterB>sort[]]"> </$list> </$set></$set></$set></$set></$set> \end For example place this in the blank line above <$link/>, or you could add another parameter and use this template \define intersect(filter1 filter2 template:"defaulttemplate") <$set name="filterA" filter="$filter1$"> <$set name="filterB" filter="$filter2$"> <$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 filter="[enlist<setAinterB>sort[]]" template="$template$"> </$list> </$set></$set></$set></$set></$set> \end Enjoy the possibilities Regards Tony On Wednesday, 6 May 2020 21:14:52 UTC+10, 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 tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/4575b9d9-66e5-4d4e-adf9-15ff6c4722ad%40googlegroups.com.
