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Clarify handling of title lists in ActionListopsWidget documentation (#8184)

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* Improve section on subfilter expressions

* Further refinement of the info box.
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yaisog 2024-05-29 12:39:41 +02:00 committed by GitHub
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editions/tw5.com/tiddlers/widgets/ActionListopsWidget.tid
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@ -1,6 +1,6 @@
caption: action-listops
created: 20141025120850184
modified: 20230805103548113
modified: 20240509135041526
myfield:
tags: ActionWidgets Widgets
title: ActionListopsWidget
@ -35,10 +35,12 @@ The above widget will toggle the presence of the element <<.value "List Item">>
Similarly, if an element is to always be removed when it is present, the `-` / `:except` [[filter run prefix|Filter Expression]] can be used. Both of the following yield the same result:
```
<$action-listops $subfilter="-[[List Item]]"/>
<$action-listops $subfilter="+[remove[List Item]]"/>
<$action-listops $subfilter="-[[ListItem]]"/>
<$action-listops $subfilter="+[remove[ListItem]]"/>
```
<<.infoBox """Note that the parameter of the [[remove Operator]] is a [[Title List]]. To remove one or more titles containing spaces the individual titles must be wrapped in double square brackets, usually via a soft [[Filter Parameter]]. See //Filtered List Variable Assignment// in the [[SetWidget]] documentation to learn more.""">>
Without any prefixes, the filter run output is simply [[dominantly appended|Dominant Append]] to the list.
See also the [[Examples|ActionListopsWidget (Examples)]].