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Make sure split(regex) returns an array of strings (#8222)

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* make sure split(regex) returns an array of strings

* remove "undefined" from the output

* add info about capture groups to the docs
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Mario Pietsch 2024-06-08 18:09:21 +02:00 committed by GitHub
parent a67c0e1399
commit 12c551ef05
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GPG Key ID: B5690EEEBB952194
2 changed files with 26 additions and 5 deletions
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5
core/modules/filters/strings.js
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@ -217,7 +217,10 @@ exports.splitregexp = function(source,operator,options) {
return ["RegExp error: " + ex]; return ["RegExp error: " + ex];
} }
source(function(tiddler,title) { source(function(tiddler,title) {
Array.prototype.push.apply(result,title.split(regExp)); var parts = title.split(regExp).map(function(part){
return part || ""; // make sure it's a string
});
Array.prototype.push.apply(result,parts);
}); });
return result; return result;
}; };

22
editions/tw5.com/tiddlers/filters/splitregexp Operator.tid
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@ -1,6 +1,6 @@
caption: splitregexp caption: splitregexp
created: 20190613154722705 created: 20190613154722705
modified: 20190613154924724 modified: 20240606113433618
op-input: a [[selection of titles|Title Selection]] op-input: a [[selection of titles|Title Selection]]
op-output: the input titles split into separate items according to the specified regular expression <<.place R>> op-output: the input titles split into separate items according to the specified regular expression <<.place R>>
op-parameter: The regular expression at which to split each title op-parameter: The regular expression at which to split each title
@ -13,7 +13,7 @@ type: text/vnd.tiddlywiki
<<.from-version "5.1.20">> <<.from-version "5.1.20">>
Note that in some circumstances the <<.op splitregexp>> operator will include blank items in the list of results. For example, <<.note """... that in some circumstances the <<.op splitregexp>> operator will include blank items in the list of results. For example, """>>
``` ```
[[the band thethe are the best the]splitregexp[the]] [[the band thethe are the best the]splitregexp[the]]
@ -42,3 +42,21 @@ Syntax errors in the regular expression will cause the filter to return an error
<<.operator-example 2 "[[the cat sat on the mat]splitregexp[\]]">> <<.operator-example 2 "[[the cat sat on the mat]splitregexp[\]]">>
<<.operator-examples "splitregexp">> <<.operator-examples "splitregexp">>
----
The <<.op splitregexp>> operator is intended to be used as described above. If the `regexp` contains //capture groups// those groups will be included into the output.
<<.bad-example """```
\procedure re() (color)|(colour)ed
\procedure str() Some coloured text
{{{ [<str>splitregexp<re>join[, ]] }}}
```""">>
Somewhat more useful may be this code.
```
\procedure re() (colou?red)
\procedure str() Some coloured text
{{{ [<str>splitregexp<re>join[, ]] }}}
```