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TiddlyWiki5/editions/tw5.com/tiddlers/Operators without parameters.tid

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created: 20240708171243370
modified: 20240708201827711
tags:
title: Operators without parameters
Many [[Filter Operators]] have no [[parameter|Filter Parameter]] available. Still, each operator must be followed by a bracketed parameter expression — even if it is empty — as with the <<.olink backlinks>> operator below:
`[<currentTiddler>backlinks[]]`
(Even though an expression such as `[<currentTiddler>backlinks]` may at first <<.em seem>> well-formed — insofar as closing brackets seem to pair properly with opening brackets — each operator needs its own parameter brackets, even if empty. See [[Filter Syntax]].)
The following [[Filter Operators]] accept no parameters:
<div>
<<list-links filter:"[op-parameter[none]] [tag[Filter Operators]!has[op-parameter]] -[search:op-purpose[same]]" class:"multi-columns">>
</div>