Mohammad, Aren't we lucky the *is* operator and the *all* operator aren't the same. Otherwise one would be redundant!
Reading the documentation of the *is* operator (including the last line): *input* a selection of titles > <https://tiddlywiki.com/#Title%20Selection> > > The all <https://tiddlywiki.com/#all%20Operator> operator is similar, but > its scope is the whole wiki. > To get the proper input into the *is* operator, I imagine it would need to be done with an explicit input, otherwise the way you wrote it, it would ONLY take the Current Tiddler the code was in as its input. To see that effect, put your code in a tiddler [[01]] and save it, and see the result! I believe the proper way to do what you want is like this: <$list filter="01 02 03"> <$set name="xx" filter="[<currentTiddler>is[current]addprefix[Lec]]" emptyValue="No output"> <<xx>> </$set> </$list> Regards On Sunday, February 3, 2019 at 6:25:10 PM UTC+7, Mohammad wrote: > > Look at the below codes > > > > - Case i > > <$list filter="01 02 03"> > <$set name="xx" filter="[all[current]addprefix[Lec]]" emptyValue="No > output"> > <<xx>> > </$set> > </$list> > > Produces: Lec01 Lec02 Lec03 > > > > - Case ii > > <$list filter="01 02 03"> > <$set name="xx" filter="[is[current]addprefix[Lec]]" emptyValue="No > output"> > <<xx>> > </$set> > </$list> > > Produces: No output No output No output > > > What is the problem? Isn't it the *all *and *is *operator are the same? > > --Mohammad > -- 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/bf2c487c-ab81-48de-b626-126d341c0f63%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

