Mat, I expect the macro test1 returns B for test 3, becuase while a param is empty but b has value and [[$a$]] [[$b$]] means OR Am I right?
--Mohammad On Friday, April 5, 2019 at 5:48:35 PM UTC+4:30, Matthew Lauber wrote: > > The difference is due to the enlist filter. In the first test case, [[]] > is parsed as a tiddler title with the empty string "" as it's value. > Weird, but it's still added to the input title list of the filter. But in > the enlist filter, it does string parsing to determine all the titles in > the parameter, and it determines there aren't any in the param, so it > doesn't add anything to the list of input tiddlers titles. > > On Friday, April 5, 2019 at 8:46:40 AM UTC-4, Mohammad wrote: >> >> Hi S.S., >> Thank you for sharing! >> I don't understand the result of test 3 in two cases! Why they are >> different? >> >> --Mohammad >> >> >> >> On Friday, April 5, 2019 at 3:48:16 PM UTC+4:30, S. S. wrote: >>> >>> >>> When trying to test for an *either/or* parameter, I used a filter, and >>> found this interesting behaviour: >>> >>> \define test1(a b) >>> <$list filter="[[$a$]] [[$b$]] +[limit[1]]" emptyMessage="c"></$list> >>> \end >>> \define test2(a b) >>> <$list filter="[enlist[$a$]] [enlist[$b$]] +[limit[1]]" emptyMessage="c" >>> ></$list> >>> \end >>> >>> !! Test 1 >>> 1. <<test1 a:A b:B>> <br> >>> 2. <<test1 a:A b:"">> <br> >>> 3. <<test1 a:"" b:B>> <br> >>> 4. <<test1 a:"" b:"">> <br> >>> >>> !!Test 2 >>> 1. <<test2 a:A b:B>> <br> >>> 2. <<test2 a:A b:"">> <br> >>> 3. <<test2 a:"" b:B>> <br> >>> 4. <<test2 a:"" b:"">> <br> >>> >>> >>> Test 1 >>> >>> 1. A >>> 2. A >>> 3. >>> 4. >>> >>> Test 2 >>> >>> 1. A >>> 2. A >>> 3. B >>> 4. c >>> >>> Perhaps useful too keep in mind! >>> >>> Cheers >>> >>> >>> >>> -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/65caf201-cff7-4d77-a5dc-46eff86f9e57%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
