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created: 20140410103123179
2015-02-03 19:29:25 +00:00
modified: 20150203190515000
2015-01-24 21:18:44 +00:00
tags: [[Filter Operators]] [[Field Operators]] [[Order Operators]]
title: previous Operator
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type: text/vnd.tiddlywiki
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caption: previous
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op-purpose: find which titles in a <<.field list>> field precede the input ones
op-input: a [[selection of titles|Title Selection]]
op-parameter: a tiddler title
op-parameter-name: T
op-output: a selection containing each title that immediately precedes each of the input titles in the <<.field list>> field of <<.place T>>
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Each input title is processed in turn, and its predecessor is located in the <<.field list>> field and appended to the output. If a title is not listed in the field, or is the first item there, then it contributes nothing to the output.
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<<.operator-examples "previous">>