mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-04 09:06:18 +00:00
14 lines
922 B
Plaintext
14 lines
922 B
Plaintext
created: 20150117204109000
|
|
modified: 20150129133830000
|
|
tags: Concepts
|
|
title: Selection Constructors
|
|
type: text/vnd.tiddlywiki
|
|
|
|
The output of a [[filter|Filters]] step depends on its [[operator|Filter Operators]]:
|
|
|
|
* Most operators derive their output from their input. For example, many of them output a subset of their input, and thus truly live up to the name of <<.word filters>>, narrowing down the overall output of the containing [[run|Filter Run]]. These operators are called <<.def "selection modifiers">>.
|
|
|
|
* A few operators ignore their input and generate an independent output instead. These are called <<.def "selection constructors">>: they construct an entirely new [[selection|Title Selection]].
|
|
|
|
A good example of a constructor is <<.olink title>>. The output of `[title[A]title[B]]` is just <<.tid B>>. But the <<.olink field>> operator is a modifier, so `[title[A]field:title[B]` outputs nothing at all.
|