16th January 2021 at 8:13am
| purpose | applies a prefix to each input title to yield the title of a tiddler from which the final value is retrieved. With a single parameter, the default field is "text" and the default index is "0". If a second parameter is provided, that becomes the target field or index. |
|---|---|
| input | a selection of titles |
| suffix | D, I=the default value to be used for missing lookups. This operator can now accept a second suffix of :index, see below for details |
| parameter | P, T=prefix applied to input titles to yield title of lookup tiddler from which value is retrieved. Now accepts 1 or 2 parameters, see below for details |
| output | the lookup values corresponding to each lookup tiddler |
Learn more about how to use Filters
Introduced in v5.1.15
The action of this operator is as follows with 1 parameter:
- Apply the specified prefix to each input tiddler title, yielding a new list of tiddler titles
- Transclude the value of the
textfield each of those tiddlers- Substitute the default value for missing or empty values
- Return the list of values
The use of the :index second suffix changes the default lookup location from field: text to index: 0. This is used if no 2nd parameter is provided.
The action of this operator is as follows with 2 parameters:
If there are two parameters provided, use the second parameter as the target field or index.
Then:
- Apply the specified prefix to each input tiddler title, yielding a new list of tiddler titles
- Transclude the value of the target field or index
- Substitute the default value for missing or empty values
- Return the list of values