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19 lines
713 B
Plaintext
19 lines
713 B
Plaintext
created: 20140410103123179
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modified: 20150118183030000
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tags: [[Filter Operators]] [[Group Operators]]
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title: each Operator
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type: text/vnd.tiddlywiki
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caption: each
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purpose: get one of each group of input tiddlers by field value
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<$macrocall $name=".operator-def"
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input="a [[set|Tiddler Sets]] of tiddler titles"
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parameter="the name of a [[field|TiddlerFields]]"
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paramName="f"
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output="a set containing the first tiddler with each distinct value for field <<.place f>>"
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/>
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Each input tiddler is processed in turn. The value of field <<.place f>> in that tiddler is examined, and as long as the value has not been encountered before, the tiddler's title is appended to the output set.
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<<.operator-examples "each">>
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