OK, here's what worked for me. It took me a bit to figure it out,
especially for making it work on a JSON tree, but it works.
\define makeRowspan()
<$vars currentAction={{{ [all[current]indexes[Actions]sort[]first[]] }}}
cnt="0" >
<<addRows>>
</$vars>
\end
define addRows()
<$set name="Items" filter=
"[all[current]indexes[Actions]addprefix[Actions/]addsuffix[/Items]]" select
=<<currentAction>> >
<$set name="itemCount" value={{{ [all[current]indexes<Items>count[]] }}} >
<$vars cnt={{{ [<cnt>add<itemCount>] }}} >
<$list variable="currentAction" filter=
"[all[current]indexes[Actions]sort[]after<currentAction>]" emptyMessage=
"<<cnt>>" >
<<addRows>>
</$list>
</$vars>
</$set>
</$set>
\end
and then in the <table>
<$wikify name=rows text=<<makeRowspan>> >
<td rowspan=<<rows>> >
...
Thanks so much, Saq and Tony, this took me a lot further on the learning
curve. Without you, I would have never come across using first[] and
after[].
Best, Werner
Am Donnerstag, 27. August 2020 19:56:38 UTC+2 schrieb Saq Imtiaz:
>
> @werner precisely, its a recursive macro that processes each row, and
> calls the macro again with the next row, inside a new vars widget with the
> new incremented value of the variable.
>
> The emptyMessage is triggered at the end and gives the final cumulative
> value.
>
> On Thursday, August 27, 2020 at 6:36:01 PM UTC+2 Werner wrote:
>
>> Thanks, Saq, so this means you are using recursion? Didn't realize this
>> was possible in TW. I will yet have to try it out and get back to you.
>>
>>
>> Am Mittwoch, 26. August 2020 22:41:16 UTC+2 schrieb Saq Imtiaz:
>>>
>>> I'm a bit tired so this isn't as clear as I would like, but hopefully
>>> this pseudocode will point you in the correct direction for the pattern for
>>> getting this done with just wikitext:
>>>
>>> \define processRow()
>>> nestedRows = level2 +count[]
>>> <$vars cnt={{{[<cnt>add<nestedRows>]}}}>
>>> <$list filter="[[allrows] +[after<currentTiddler>]]"
>>> emptyMessage="<<cnt>>">
>>> <<processRow>>
>>> </$list>
>>> </$vars>
>>> \end
>>>
>>> \define processAllRows()
>>> <$vars currentTiddler={{{[allrows] + first[]}}} cnt="0">
>>> <<processRow>>
>>> </$vars>
>>> \end
>>>
>>> <td rowspan=<<processAllRows>> > or set it to a variable for re-use.
>>>
>>> On Wednesday, August 26, 2020 at 9:16:30 PM UTC+2 Werner wrote:
>>>
>>>> Good evening guys, me again.
>>>>
>>>> I understand that the scope of a variable is defined by the enclosing
>>>> <$vars> <$set> or <$wikify> widgets. I also understand that any new <$set>
>>>> widget opens up a new scope, where a variable <myVar> defined in an outer
>>>> scope would be overridden. I am facing a problem where I would need to
>>>> access out-of-scope variables (or come up with a completely different
>>>> approach).
>>>>
>>>> I am still working on a set of double-nested JSON data (using Josh
>>>> Fontany's JSONmangler plugin). I want to display the content of the data
>>>> in
>>>> a table using table cells spanning multiple rows like <td rowspan = "5">.
>>>> The problem here is, the rowspan is defined by the number of elements in
>>>> the lowest nested level and I would need it before rendering the table and
>>>> looping through the array elements fetching the data. So typically, in a
>>>> garden variety programming language, I would do something as follows:
>>>>
>>>> totalRows = 0
>>>> Loop through Level1
>>>> nestedRows= Level2.count()
>>>> totalRows += nestedRows
>>>> End Loop
>>>>
>>>> Could anybody enlighten me, if a construct like this is possible in TW
>>>> and how I would achieve it?
>>>>
>>>> Two fallback options:
>>>> - storing the number of elements in the JSON structure (yuck - feels
>>>> like cheating).
>>>> - throwing the whole JSON data structure at an JS macro. Positive side
>>>> effect: I would have to dive into it and learn something new.
>>>>
>>>> Thanks for helping me out on this.
>>>> Best, Werner
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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