On Saturday, July 11, 2020 at 7:59:42 AM UTC-7, Guido B wrote:
>
> I use the following filter expression to list all tiddlers where the field
> "musiker" contains the title of the current tiddler:
>
>> <$set name=name value= {{!!title}}>
>> <<table-dynamic filter:"[regexp:musiker<name>]" fields:"title interpret
>> year label stil">>
>> </$set>
>
>
> Problem: for a name like "Arca", it does not only list those tiddlers
> containing "Arca", but also those containing "Arcade Fire".
> Solution: I use a regex-pattern like (?<![\w\d])Arca(?![\w\d])
>
> Here's my question: how can I combine a variable name (in this case
> <name>) with a regex-pattern in a filter expression?
>
Use a macro to construct the regexp pattern, like this:
\define pattern() (?<![\w\d])$(name)$(?![\w\d])
<$vars name={{!!title}}>
<<table-dynamic filter:"[regexp:musiker<pattern>]" fields:"title interpret
year label stil">>
</$vars>
Notes:
* I prefer to use the <$vars> widget rather than the older <$set> widget to
get the title value into a variable
* The macro does a direct string replacement to insert the current value of
the "name" variable into the regexp
* I think there was a missing "]" in your filter syntax. I assume this was
just a typo or copy/paste error.
Give it a try and let me know how it goes...
enjoy,
-e
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