When prefix is currentTiddler + comma

1

I have this filter in viewtemplate:

<<tabs "[!is[system]prefix<currentTiddler>sort[caption]] -[<currentTiddler>]" "" "$:/state/tab1" "tc-vertical">>

But I would like to change it so that it grabs only the tiddlers that star with currentTiddler followed immediately by a comma. But not the others that have the currentTiddler but no comma immediately following.

What do I need to do?

2

Currently, until we have prametrized transclusions, I’d say you need to use a macro to concatename current with a comma and refer to it, something like

\define curr() $(currentTiddler)$,

<$let curr=<<curr>>>
<<tabs ... >>
</$let>

(I didn’t test it)

3

Try changing the filter along these lines:

[!is[system]] :filter[removeprefix<currentTiddler>prefix[,]] :and[sort[caption]] -[<currentTiddler>]

4

Thanks TWMat and Saq, but neither of these work…

TWMat’s makes a tab of every tiddler in the file. In Saq’s, nothing appears.

Saq, why use “removeprefix”? (I also tried it with prefix instead of removeprefix, with no results.

5

Apologies Dave, there is a typo as a result of typing this out on a touch screen:

[!is[system]] :filter[removeprefix<..currentTiddler>prefix[,]] :and[sort[caption]] -[<currentTiddler>]

The logic behind removing the prefix if it exists, is that you can then check if the remaining text has a prefix of the comma character. The entire run starting with :filter is like a sieve that only lets through the titles that meet those criteria.

6

@saqimtiaz I think I am also I correct in saying;

removeprefix<..currentTiddler> also only operates on and if, the tiddler has the prefix “current tiddler” thus also performing the initial filtering, that a simple prefix would also do.

7

I do not understand what this means. If you have alternative and equivalent code to propose please post it.

8

@saqimtiaz

As asked,

I could have expanded my words further.

I am stating, in part, how the remove prefix removeprefix<..currentTiddler> also only acts on tiddlers beginning with “current Tiddler”, which is what @DaveGifford was trying to understand, he thought the “prefix” operator was appropriate.

  • That is there are cases such as removeprefix `which are a filter and an action.
  • I wanted your view / confirmation since this is occurring inside the “:filter” run.
9

Here’s a more verbose description of what Saq’s filter syntax is doing:

  • Outside of the :filter[...] syntax, <currentTiddler> refers to the tiddler containing the <<tabs>> macro.

  • However, within the :filter[...] syntax, <currentTiddler> refers to each of the tiddlers found by the preceding filter run (i.e.,[!is[system]).

  • To refer to the original tiddler containing the <<tabs>> macro from within the :filter[...] syntax, we need to use the special filter variable, <..currentTiddler>.

  • Thus, within the :filter[...] syntax, using removeprefix<..currentTiddler> identifies titles matched by [!is[system] that start with the original tiddler title, and also removes that leading title text, so that the subsequent [prefix[,]] syntax can check to see if the rest of the matched title starts with a comma.

  • The result of processing the :filter[...] run is that only tiddlers that match [!is[system] and also start with the title of the containing tiddler followed by a comma are retained for processing by the remainder of the filter runs (i.e., :and[sort[caption]] -[<currentTiddler>]). Q.E.D

-e

10

Which is what I was trying to say, thanks for your clarity Eric.

11

Thank you to everyone for yourhelp and explanations. It is snowing hard here in Michigan and we were out on a visit. I will look at it now.

12

aaaand it works like a charm. And now I even am starting to understand how it works!