This kind of job can be done very easily using

TiddlyTables

or 

Shiraz (its dynamic table)

Both are pure wikitext plugins NO JavaScript, NO overwriting core tiddlers!

Safe and robust!

--Mohammad

On Monday, April 6, 2020 at 8:07:48 PM UTC+4:30, David wrote:
>
> I have a bunch of tiddlers with the tag of "Task" and a field called 
> "context" 
>
> I'd like to loop over them, or whatever, and end up with a variable or 
> tiddler that is a list of all the different values found in that "context" 
> field.
>
> I then plan to loop over that and show some stuff.  Right now, that list 
> is static and manually created by me.
>
> I don't know if there is a command to do it efficiently, or if a loop is 
> necessary.
>
> For example... if tiddlers look like...
>
> Name/Title    | Context (Field)
> --------------|--------------------------------------
> Clean Gutters | Home
> Wash Car      | Home
> Call School   | Work
> Buy bolts     | Out
>
>
> Then it should save "Home Work Out" into a variable or tiddler.  I guess 
> variable would be best, if possible.
>
> Here is some code to loop over the tag in question, and this transclude 
> command outputs the context, but of course, there are repeats (which I 
> don't want).  And of course, this doesn't save it to a variable.  But maybe 
> it's a good start?
>
> <$list filter="[tag[Task]]" variable="item">
>  <$transclude tiddler=<<item>> field="context" />
> </$list>
>
>
>

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