19 lines
1.0 KiB
Plaintext
19 lines
1.0 KiB
Plaintext
created: 20140410103123179
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modified: 20221229094244039
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tags: [[Filter Operators]]
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title: indexes Operator
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type: text/vnd.tiddlywiki
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caption: indexes
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op-purpose: select all data properties of the input titles
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op-input: a [[selection of titles|Title Selection]]
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op-parameter: none
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op-output: all the property names or indices contained in the input data tiddlers
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Each input title is processed in turn, and is ignored if it does not denote a [[data tiddler|DataTiddlers]]. The sorted list of property names is retrieved from the data tiddler and then [[dominantly appended|Dominant Append]] to the operator's output.
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Note that behind the scenes, the name/value pairs in a dictionary tiddler are represented as a [[JSON object|JSONTiddlers]]. JSON objects do not maintain a guaranteed ordering and so we cannot reliably retain the ordering of the data in the file.
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Where the content of a tiddler is in JSON format with an array as its root, the <<.op indexes>> operator retrieves a selection of integer indices instead.
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<<.operator-examples "indexes">>
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