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17 lines
894 B
Plaintext
17 lines
894 B
Plaintext
caption: getindex
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created: 20150203140000000
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modified: 20230309163838670
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op-input: a [[selection of titles|Title Selection]]
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op-output: the values of property <<.place P>> in each of the input titles
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op-parameter: the name of a [[property|DataTiddlers]]
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op-parameter-name: P
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op-purpose: select all values of a data property in the input titles
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tags: [[Filter Operators]] [[Field Operators]]
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title: getindex Operator
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Each input title is processed in turn, and is ignored if it does not denote a [[data tiddler|DataTiddlers]]. If the corresponding tiddler contains property <<.place P>>, and the value of this property is not empty, then its value is appended to the output.
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<<.tip "Unlike most other [[Filter Operators]], the [[selection|Title Selection]] output by <<.op getindex>> can contain duplicates. To avoid duplicates, use `getindex[P]unique[]`.">>
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<<.operator-examples "getindex">>
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