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In 'Filter Operators' add column to indicate those operators that construct an entirely new selection. (#6351)

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Louis Davout 2022-01-09 09:44:19 -05:00 committed by GitHub
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12
editions/tw5.com/tiddlers/filters/Filter Operators.tid
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@ -1,5 +1,5 @@
created: 20140410103123179 created: 20140410103123179
modified: 20210830010231559 modified: 20211217141224284
tags: Filters tags: Filters
title: Filter Operators title: Filter Operators
type: text/vnd.tiddlywiki type: text/vnd.tiddlywiki
@ -10,18 +10,21 @@ type: text/vnd.tiddlywiki
<td>{{!!op-purpose}}</td> <td>{{!!op-purpose}}</td>
<td align="center"><$list filter="[all[current]tag[Common Operators]]">✓</$list></td> <td align="center"><$list filter="[all[current]tag[Common Operators]]">✓</$list></td>
<td align="center"><$list filter="[all[current]tag[Negatable Operators]]">`!`</$list></td> <td align="center"><$list filter="[all[current]tag[Negatable Operators]]">`!`</$list></td>
<td align="center"><$list filter="[all[current]tag[Selection Constructors]!tag[Selection Constructors: Conditional]]">`C`</$list><$list filter="[all[current]tag[Selection Constructors]tag[Selection Constructors: Conditional]]">`C?`</$list></td>
</tr></$list> </tr></$list>
\end \end
\define .group-heading(_) \define .group-heading(_)
<tr class="doc-table-subheading"><th colspan="4" align="center">$_$</th></tr> <tr class="doc-table-subheading"><th colspan="5" align="center">$_$</th></tr>
\end \end
A <<.def "filter operator">> is a predefined keyword attached to an individual [[step|Filter Step]] of a [[filter|Filters]]. It defines the particular action of that step. A <<.def "filter operator">> is a predefined keyword attached to an individual [[step|Filter Step]] of a [[filter|Filters]]. It defines the particular action of that step.
''Important:'' Each first [[step|Filter Step]] of a [[filter run|Filter Run]] not given any input titles receives the output of <$link to="all Operator">[all[tiddlers]]</$link> as its input. ''Important:'' Each first [[step|Filter Step]] of a [[filter run|Filter Run]] not given any input titles receives the output of <$link to="all Operator">[all[tiddlers]]</$link> as its input.
The following table lists all core operators, the most common ones marked ✓. The last column indicates whether an operator allows ''negation'' using the <$link to="Filter Step"><code>!</code> prefix</$link>. For specifics as to each operator's negated output please refer to its documentation. The following table lists all core operators, the most common ones marked ✓. The `!` column indicates whether an operator allows ''negation'' using the <$link to="Filter Step"><code>!</code> prefix</$link>. For specifics as to each operator's negated output please refer to its documentation.
Most steps process the [[selection of titles|Title Selection]] that are supplied as their input, but a few [[construct an entirely new selection|Selection Constructors]] instead, as indicated by the last column. A `C?` indicates it might construct a new selection, depending on usage. For specifics as to each operator's selection creation please refer to its documentation.
<table> <table>
<tr> <tr>
@ -29,6 +32,7 @@ The following table lists all core operators, the most common ones marked ✓. T
<th align="left">Purpose</th> <th align="left">Purpose</th>
<th align="center">✓</th> <th align="center">✓</th>
<th align="center">`!`</th> <th align="center">`!`</th>
<th align="center">`C`</th>
</tr> </tr>
<<.operator-rows "[tag[Filter Operators]!tag[Order Operators]!tag[Mathematics Operators]!tag[String Operators]!tag[Tag Operators]!tag[Special Operators]sort[]]">> <<.operator-rows "[tag[Filter Operators]!tag[Order Operators]!tag[Mathematics Operators]!tag[String Operators]!tag[Tag Operators]!tag[Special Operators]sort[]]">>
<<.group-heading "Order Operators">> <<.group-heading "Order Operators">>
@ -47,4 +51,4 @@ The following table lists all core operators, the most common ones marked ✓. T
A typical step is written as `[operator[parameter]]`, although not all of the operators need a [[parameter|Filter Parameter]]. A typical step is written as `[operator[parameter]]`, although not all of the operators need a [[parameter|Filter Parameter]].
Most steps process the [[selection of titles|Title Selection]] that are supplied as their input, but a few [[construct an entirely new selection|Selection Constructors]] instead. For the exact rules, see [[Filter Syntax]]. For the exact rules, see [[Filter Syntax]].

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editions/tw5.com/tiddlers/filters/all.tid
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@ -1,11 +1,11 @@
caption: all caption: all
created: 20140410103123179 created: 20140410103123179
modified: 20161128185445034 modified: 20211217135719266
op-input: ignored, unless the parameter is empty op-input: ignored, unless the parameter is empty
op-output: the titles that belong to all the specified categories op-output: the titles that belong to all the specified categories
op-parameter: zero or more categories op-parameter: zero or more categories
op-purpose: find all titles of a fundamental category op-purpose: find all titles of a fundamental category
tags: [[Filter Operators]] [[Common Operators]] [[Selection Constructors]] tags: [[Filter Operators]] [[Common Operators]] [[Selection Constructors]] [[Selection Constructors: Conditional]]
title: all Operator title: all Operator
type: text/vnd.tiddlywiki type: text/vnd.tiddlywiki

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editions/tw5.com/tiddlers/filters/subfilter Operator.tid
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@ -1,6 +1,6 @@
caption: subfilter caption: subfilter
created: 20181031175129475 created: 20181031175129475
modified: 20211030223407188 modified: 20211217135706478
op-input: a [[selection of titles|Title Selection]] passed as input to the subfilter op-input: a [[selection of titles|Title Selection]] passed as input to the subfilter
op-neg-input: a [[selection of titles|Title Selection]] passed as input to the subfilter op-neg-input: a [[selection of titles|Title Selection]] passed as input to the subfilter
op-neg-output: those input titles that are <<.em not>> returned from the subfilter <<.place S>> op-neg-output: those input titles that are <<.em not>> returned from the subfilter <<.place S>>
@ -8,7 +8,7 @@ op-output: the [[selection of titles|Title Selection]] returned from the subfilt
op-parameter: a [[filter expression|Filter Expression]] op-parameter: a [[filter expression|Filter Expression]]
op-parameter-name: S op-parameter-name: S
op-purpose: select titles from the operand interpreted as a [[filter expression|Filter Expression]] op-purpose: select titles from the operand interpreted as a [[filter expression|Filter Expression]]
tags: [[Filter Operators]] [[Field Operators]] [[Selection Constructors]] [[Negatable Operators]] tags: [[Filter Operators]] [[Field Operators]] [[Selection Constructors]] [[Negatable Operators]] [[Selection Constructors: Conditional]]
title: subfilter Operator title: subfilter Operator
type: text/vnd.tiddlywiki type: text/vnd.tiddlywiki