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* Initial commit * Replace previous result only when non-empty * Add doc tiddler * Small change in rp-output description * Update FRP title lowercase with colon prefix * Integrate with other doc tiddlers * Add two doc-styles for reuse * Add tests * Add another test * Correct indentation in stylesheet * Change title and tags, add example to doc tiddler * Replace leading spaces with tabs * Improve docs text and structure
50 lines
2.2 KiB
Plaintext
50 lines
2.2 KiB
Plaintext
created: 20230617183745774
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modified: 20230617183745774
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tags: [[Then Filter Run Prefix]]
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title: Then Filter Run Prefix (Examples)
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type: text/vnd.tiddlywiki
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!! Conditional Execution
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The <<.op :then>> filter run prefix can be used to avoid the need for nested [[ListWidget]]s or [[Macro Definitions in WikiText]].
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<$macrocall $name='wikitext-example-without-html'
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src="""<$edit-text field="search" placeholder="Search title"/>
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<$let searchTerm={{!!search}}>
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<$list filter="[<searchTerm>minlength[3]] :then[!is[system]search:title<searchTerm>]" template="$:/core/ui/ListItemTemplate"/>
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</$let>"""/>
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!! Conditional (Sub)Filters
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The <<.op :then>> filter run prefix can be combined with the <<.op :else>> prefix to create conditional filters. In this example, the fields used in <<.var searchSubfilter>> for searching depend on the value of [[$:/temp/searchFields]] and the sort order used by <<.var sortSubfilter>> depends on the value of [[$:/temp/searchSort]]. Checkboxes are used to set the values of these tiddlers.
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<<.tip "Note that each filter run of the subfilter receives the input of the <<.olink subfilter>> operator as input">>
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Since the <<.olink then>> and <<.olink else>> operators cannot call subfilters or perform additional filter steps, they cannot be used for such applications.
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<$macrocall $name='wikitext-example-without-html'
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src="""<$checkbox tiddler="$:/temp/searchSort"
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field="text"
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checked="chrono" unchecked="alpha" default="alpha">
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Sort chronologically (newest first)
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</$checkbox><br/>
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<$checkbox tiddler="$:/temp/searchFields"
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field="text"
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checked="title" unchecked="default" default="title">
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Search <<.field title>> only
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</$checkbox><p/>
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<$let searchSubfilter="[{$:/temp/searchFields}match[default]] :then[search[prefix]] :else[search:title[prefix]]"
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sortSubfilter="[{$:/temp/searchSort}match[chrono]] :then[!nsort[modified]] :else[sort[title]]"
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limit=10 >
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<$list filter="[all[tiddlers]!is[system]subfilter<searchSubfilter>subfilter<sortSubfilter>first<limit>]">
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<$link/> (<$text text={{{ [{!!modified}format:date[YYYY-0MM-0DD]] }}} />)<br/>
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</$list>
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<$list filter="[all[tiddlers]!is[system]subfilter<searchSubfilter>rest<limit>count[]]">
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... and <<currentTiddler>> more.
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</$list>
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</$let>"""/>
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