You can use this to find the position of an item in a list
+[allbefore<item>count[]add[1]]
e.g
{{{ one two three four five +[allbefore[four]count[]add[1]] }}} ----> 4
Not sure it's the optimal solution, I just made it up.
<:-)
On Tuesday, March 23, 2021 at 10:57:48 AM UTC+1 Mohamed Amin wrote:
> Hi,
>
> Is there a way to get the position of an item in a "list field"?
>
> More info:
> Recently I've discovered the "nth" filter operator
> <https://tiddlywiki.com/#nth%20Operator>, and one of the use case I
> immediately think about was to "iterate" through items in multiple related
> "list fields"
>
> Take the following example (not a real one, just to get the idea clear):
> If a family needs to manage its friends, each family member's Tiddler will
> have the following fields:
> 1- friend-names : "list field" contains ALL friends
> 2- friendships-start-date : "list field" where the "position" of the date
> determine the friend's names
> 3- friendships-meter : "list field" where the "position" of the %
> determine the friend's names
>
> Ex.
> friend-names : [[alex]] [[andy]] [[john]]
> [[evan]]
> friendships-start-date : [[Mar2015]] [[Dec2017]] [[Nov2016]]
> [[Feb2011]]
> friendships-meter [[70]] [[30]] [[60]]
> [[90]]
>
> Now I can use the filter "[contain:friend-name[alex]]" to get all family
> members who is a friend with "alex".
> And if I know the <<position>> of "alex" in the "friend-names" field, I
> can get the rest of the data corresponding to it for the currentTiddler
> using a filter like:
> "[all[current]get[friendships-meter]enlist-input[]nth<position>]"
>
> Regards
>
>
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