Hi David,
Actually, I have another question.
>
How would I compile the results of the internal list into a single list,
>
rather than separate lists for every element in the parent list?
>
I'd be glad to learn I'm wrong, but I don't think that's currently possible.
One way to eventually implement this could be to create a new *filter*
filter
which would run a given filter expression against the input set,
which in your case could look like so:
<$set name="planets-in-system" value="[tag[planet]field:solar_system
<this_system>]">
{{{ [tag[star_system]field:quadrant[Alpha Quadrant]filter:this_system
<planets-in-system>]] }}}
</$set>
So, what would this do?
1. define a variable called *planets-in-system* specifying a filter
expression using a variable called *this_system*
2. evaluate this filter expression against the titles fetched as
*star_system* in the *Aplha Quadrant*
- while replacing the variable *this_system* with each item in this
input set
This would allow to combine a number of filter expressions into one
big sophisticated filter.
I have left the above proposal at an appropriate issue on GitHub:
*#2033 complex conditions ...how?*
issuecomment-158101715
<https://github.com/Jermolene/TiddlyWiki5/issues/2033#issuecomment-158101715>
Best wishes,
— tb
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