created: 20140410103123179
modified: 20150203191843000
tags: [[Filter Operators]] [[Common Operators]] [[Field Operators]] [[Negatable Operators]]
title: has Operator
type: text/vnd.tiddlywiki
caption: has
op-purpose: filter the input by field existence
op-input: a [[selection of titles|Title Selection]]
op-parameter: the name of a [[field|TiddlerFields]]
op-parameter-name: F
op-output: those input tiddlers in which field <<.place F>> has a non-empty value
op-neg-output: those input tiddlers in which field <<.place F>> does <<.em not>> exist or has an empty value

<<.operator-examples "has">>
