mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-07-08 13:04:21 +00:00
79 lines
1.7 KiB
Plaintext
79 lines
1.7 KiB
Plaintext
caption: Variables
|
|
created: 20141002141231992
|
|
modified: 20150107121000000
|
|
tags: WikiText
|
|
title: Variables in WikiText
|
|
type: text/vnd.tiddlywiki
|
|
|
|
\define tags() {{!!tags}}
|
|
|
|
[[Variables]] contain values. They are available within the scope of the [[widget|Widgets]] in which they are defined, as well as all child widgets in the widget tree.
|
|
|
|
!!Defining Variables
|
|
|
|
Variables are defined by...
|
|
|
|
; [[Macros|Macros in WikiText]]
|
|
: in fact, variables are macro shorthands (see example below)
|
|
; SetWidget
|
|
: sets a variable to a value
|
|
; ListWidget
|
|
: sets list-item and iterator variabes
|
|
; TiddlyWiki
|
|
: in the core and core templates
|
|
|
|
!!Using Variables
|
|
|
|
Variables are used...
|
|
|
|
; via shorthand
|
|
:`<<variableName>>`
|
|
; via variable substitution within [[macros|Macros]]
|
|
:`$(variableName)$`
|
|
; as parameters to [[filter steps|Filters]]
|
|
: `[operator<variableName>]`
|
|
; in [[widgets|Widgets]]
|
|
: internally, or as widget attributes
|
|
: `<$edit tiddler=<<currentTiddler>>/>`
|
|
|
|
!! Examples
|
|
|
|
''defining a variable via SetWidget''
|
|
|
|
```
|
|
<$set name=foo value=bar>
|
|
<<foo>>
|
|
</$set>
|
|
```
|
|
|
|
<<<
|
|
<$set name=foo value=bar>
|
|
<<foo>>
|
|
</$set>
|
|
<<<
|
|
|
|
''a variable is a macro''
|
|
|
|
Below, the `\define` pragma at the beginning of a tiddler [[defines the macro|Macros in WikiText]] `<<tags>>`, valid in the scope of the CurrentTiddler, returning the value of the standard `tags` field.
|
|
|
|
```
|
|
\define tags() {{!!tags}}
|
|
|
|
<<tags>>
|
|
```
|
|
|
|
<<<
|
|
<<tags>>
|
|
<<<
|
|
|
|
''using a filter variable to get all incoming links''
|
|
|
|
Using the [[backlinks|FilterOperator: backlinks]] [[filter operator|FilterOperators]] to get all tiddlers linking to this one...
|
|
|
|
```
|
|
<<list-links filter:"[<currentTiddler>backlinks[]]">>
|
|
```
|
|
|
|
<<<
|
|
<<list-links filter:"[<currentTiddler>backlinks[]]">>
|
|
<<< |