created: 20140410103123179
modified: 20220218023400000
tags: [[Filter Operators]] [[String Operators]] [[Negatable Operators]]
title: prefix Operator
type: text/vnd.tiddlywiki
caption: prefix
op-purpose: filter the input titles by how they start
op-input: a [[selection of titles|Title Selection]]
op-parameter: a string of characters
op-parameter-name: S
op-output: those input titles that start with <<.place S>>
op-neg-output: those input tiddlers that do <<.em not>> start with <<.place S>>
op-suffix: the <<.op prefix>> operator uses a rich suffix, see below for details

<<.from-version "5.2.2">>

The <<.op prefix>> operator uses an extended syntax that permits multiple flags to be passed:

```
[prefix:<flag list>[<operand>]]
```

* ''flag list'': a comma delimited list of flags
* ''operand'': filter operand

The available flags are:

* ''casesensitive'': (default), this flag forces a case-sensitive match, where upper and lower case letters are considered different
* ''caseinsensitive'': overrides the default so that upper and lower case letters are considered identical for matching purposes

<<.operator-examples "prefix">>