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22 lines
1.4 KiB
Plaintext
22 lines
1.4 KiB
Plaintext
caption: function
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created: 20220909111836951
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modified: 20220909111836951
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op-input: a [[selection of titles|Title Selection]] passed as input to the function <<.place F>>
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op-output: the [[selection of titles|Title Selection]] returned from the function <<.place F>>
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op-parameter: first parameter is the [[function name|Functions]], subsequent parameters are passed to the function by position
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op-parameter-name: F
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op-purpose: apply a [[function|Functions]] to the input list, and return the result
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tags: [[Filter Operators]]
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title: function Operator
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type: text/vnd.tiddlywiki
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<<.from-version "5.3.0">> The <<.op function>> operator applies a named [[function|Functions]] to the input titles, and returns the results from the function.
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The first parameter of the <<.op function>> operator specifies the name of the function to be called. Subsequent parameters are passed to the function.
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The mapping between the parameters is //positional//, with each consecutive parameter specified in the function call mapped to the corresponding parameter in the function definition. Any parameters that are not provided are given their default values.
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<<.tip "Compare with the similar [[filter|filter Operator]] and [[subfilter|subfilter Operator]] operators which take a filter strings as their parameter instead of a named function, and does not permit parameters to be passed">>
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<<.operator-examples "function">>
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