Gerald,
I have responded to you requirement rather than continue with your method.
I expect we could fix you method because there are some errors in your
filter(s).
My approach was to deal with each step individually and capture
intermediate values.
I hope my english is simple enough.
The following works
\define new-title() {{!!caption}} <<new-date>>
<$set name=title-date filter="[<currentTiddler>split[ ]]" select=1>
<$set name=new-date filter="[<title-date>split[-]reverse[]join[.]]">
title-date=<<title-date>><br>
new-date=<<new-date>><br>
<<new-title>>
</$set></$set>
With an explanation, each note relates to above
\define new-title() {{!!caption}} <<new-date>>
<!-- using the new-title macro to "concatenate" multiple values -->
<$set name=title-date filter="[<currentTiddler>split[ ]]" select=1>
<!-- Using set/filter to split the currentTiddler title by space and use
the select=1 to retrieve the 2nd item the title-date
(the first item is select=0) -->
<$set name=new-date filter="[<title-date>split[-]reverse[]join[.]]">
<!-- as determined previously saved as new-date -->
title-date=<<title-date>><br>
new-date=<<new-date>><br>
<!-- Display the results for your information -->
<<new-title>>
<!-- the desired result -->
</$set></$set><!-- close the above set widgets -->
You could split the `<<title-date>>` with split[-] and use select 0,1 and 2
to retrieve year month day if you wanted to use them.
I will now consider bringing it together in one filter.
Regards
Tony
On Monday, March 23, 2020 at 11:11:56 PM UTC+11, Gerald Weis wrote:
>
> Hello,
>
> i give an example
>
> Name of the Tiddler
> *Körpertyp: 2020-03-11*
>
> introduction of the caption
> *Messwert am*
>
> string to split
> *2020-03-11*
> indicatet string: *11.03.2020*
> caption complete
> * Messwert am 11.03.2020*
>
> Also from the tiddlertitle* Körpertyp: 2020-03-11 *i want to have the
> * Date-string (YYYY-MM-DD).*
> then i must have the split reverse for the date make* in
> Date-german-format (DD.MM.YYYY)*
> The caption should be
> * Messwert am (Date-german-format)*
>
> and it is a lot of tiddler with this titlestructure..
> *question: *Is it possible to have an filter like
>
> {{{ [<currentTiddler>removeprefix[Körpertyp:]][split[-]reverse[]join[.]]
> }}}
>
> thats dont work
>
>
> Am Montag, 23. März 2020 11:44:31 UTC+1 schrieb TonyM:
>>
>> Gerald,
>>
>> If what you intended worked, the result would be;
>>
>> [[<currentTiddler>removeprefix[Körpertyp:]]split[-]reverse[]join[.]]
>> Both [[ and ]] are invalid
>>
>> Another problem I see is because variables inside filters, and fields
>> etc.... only use one set of brackets
>> <$vars datum={{{ [<<datum0>>split[-]reverse[]join[.]] }}} >
>> Would be
>> <$vars datum={{{ [<datum0>split[-]reverse[]join[.]] }}} >
>>
>> In filters only one bracket is required, but outside two brackets are
>> needed otherwise they would be confused with HTML tags `<p>` etc...
>>
>> Lets see if that gets you any further.
>>
>> Bu the way one way to combine filters is using the subfilter operator
>> https://tiddlywiki.com/#subfilter%20Operator
>>
>> If you are still lost perhaps explain what you want rather than how it
>> does not work.
>>
>> Regards
>> Tony
>>
>>
>> On Monday, March 23, 2020 at 9:25:40 PM UTC+11, Gerald Weis wrote:
>>>
>>> Hi friends,
>>>
>>> i am trying to combine 2 filters.
>>>
>>> but its don't work
>>>
>>> thats my code and i don't know whats wrong.
>>>
>>> \define tabcaption()
>>> <caption>Messergebnis am
>>> <$vars datum0={{{ [<currentTiddler>removeprefix[Körpertyp:]] }}} >
>>> <$vars datum={{{ [<<datum0>>split[-]reverse[]join[.]] }}} >
>>> <<datum>>
>>> </$vars>
>>> </$vars>
>>> </caption>
>>> \end
>>>
>>> Whats my Mistake
>>>
>>> Tahnks for Help
>>>
>>
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