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Merge branch 'master' of https://github.com/Jermolene/TiddlyWiki5

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saqimtiaz
2020-10-27 17:58:24 +01:00
parent 2c03aa356f d0081a7247
commit 6eebd880d1
2 changed files with 39 additions and 7 deletions
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31
core/modules/filterrunprefixes/filter.js Normal file
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@@ -0,0 +1,31 @@
/*\
title: $:/core/modules/filterrunprefixes/filter.js
type: application/javascript
module-type: filterrunprefix
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Export our filter function
*/
exports.filter = function(operationSubFunction) {
return function(results,source,widget) {
if(results.length > 0) {
var resultsToRemove = [];
$tw.utils.each(results,function(result) {
var filtered = operationSubFunction($tw.wiki.makeTiddlerIterator([result]),widget);
if(filtered.length === 0) {
resultsToRemove.push(result);
}
});
$tw.utils.removeArrayEntries(results,resultsToRemove);
}
}
};
})();

15
editions/tw5.com/tiddlers/filters/syntax/Filter Expression.tid
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@@ -1,5 +1,5 @@
created: 20150124182421000
modified: 20190610165329062
modified: 20201027134811701
tags: [[Filter Syntax]]
title: Filter Expression
type: text/vnd.tiddlywiki
@@ -21,15 +21,16 @@ If a run has:
* the prefix `-`, output titles are <<.em removed>> from the filter's output (if such tiddlers exist)
* the prefix `+`, it receives the filter output so far as its input; its output then <<.em "replaces">> all filter ouput so far and forms the input for the next run
* <<.from-version "5.1.18">> the prefix `~`, if the filter output so far is an empty list then the output titles of the run are [[dominantly appended|Dominant Append]] to the filter's output. If the filter output so far is not an empty list then the run is ignored
* <<.from-version "5.1.23">> named prefixes for filter runs are available.
In technical / logical terms:
|!Run |!Interpretation |!Output |
|`run` |de-duplicated union of sets |... OR run |
|`=run` |union of sets without de-duplication |... OR run |
|`+run` |intersection of sets |... AND run |
|`-run` |difference of sets |... AND NOT run |
|`~run` |else |... ELSE run |
|!Run |!Equivalent named prefix |!Interpretation |!Output |
|`run` |`:or[run]` |de-duplicated union of sets |... OR run |
|`=run` |`:all[run]` |union of sets without de-duplication |... OR run |
|`+run` |`:and[run]` |intersection of sets |... AND run |
|`-run` |`:except[run]` |difference of sets |... AND NOT run |
|`~run` |`:else[run]` |else |... ELSE run |
The input of a run is normally a list of all the non-[[shadow|ShadowTiddlers]] tiddler titles in the wiki (in no particular order). But the `+` prefix can change this: