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Code Issues Releases Wiki Activity

Make it easier to see which filter Operators are selection constructors (#8349)

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springerspandrel 2024-07-09 05:43:52 -04:00 committed by GitHub
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editions/tw5.com/tiddlers/Selection Constructors: Conditional.tid Normal file
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created: 20240708174435694
modified: 20240708175546166
title: Selection Constructors: Conditional
Most [[filter Operators|filter Operator]] are either ''selection modifiers'' or [[Selection Constructors]].
Within the exceptional category <<tag>> are a tiny minority that //usually// act as ''selection modifiers'', but which can construct a fresh selection under special conditions — namely, whenever their [[parameter|Filter Parameter]] is specified with a selection constructor.
<<list-links "[tag<currentTiddler>]">>

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editions/tw5.com/tiddlers/concepts/Selection Constructors.tid
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created: 20150117204109000
modified: 20150917193713204
modified: 20240708201746542
tags: Filters
title: Selection Constructors
type: text/vnd.tiddlywiki
@ -11,3 +11,7 @@ The output of a [[Filter Step]] depends on its [[operator|Filter Operators]]:
* A few operators ignore their input and generate an independent output instead. These are called <<.def "selection constructors">>: they construct an entirely new [[selection|Title Selection]].
A good example of a constructor is <<.olink title>>. The output of `[title[A]title[B]]` is just <<.tid B>>. But the <<.olink field>> operator is a modifier, so `[title[A]field:title[B]` outputs nothing at all.
The following [[filter Operators|filter Operator]] are tagged <<tag>>:
<<list-links "[tag<currentTiddler>]" class:"multi-columns">>