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* Improve Filter Syntax documentaion / navigation * update links and missing diagrams * rename legacy prefix to shortcut prefix * Update editions/tw5.com/tiddlers/filters/Filter Operators.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/And Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Sort Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/Cascade Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * Update editions/tw5.com/tiddlers/filters/syntax/And Filter Run Prefix.tid Co-authored-by: yaisog <m@rcuswinter.de> * add most changes a suggested by yaisog * fix copy / paste from-version * replace operand with parameter in the docs * fix typo * fix typos and improve railroad diagrams consistency * move "new from version" info for filter run prefixes below the table * fix typo transclusion and substitution * Move Filters tiddler to the top level in the TOC * wip-breadcrumbs * breadcrumbs & breadcrumbsList macro final * remove files that do not belong to this PR * restore release banner * add simple / story mode to breadcrumbs * .breadcrumbs macro update comments * new breadcrumbs CSS, woks with small screens * make CSS configurable using hidden-settings * improve CSS fro small screens * remove the initial: recursiveParentTag macro * improve location info for breadcrumbs nav. add "alt-text" for Edge ::after element * breadcrumbs add mode=field * bc add initial docs * breadcrumbsField will also respect the story ordering * add configurable global filterMode setting * improve arrow CSS for browser zooming * add bc links use bc-caption if caption field is non-empty * breadcrumbs improve comments * breadcrumbs aria-lable uses caption if there is one * breadcrumbs improve documentation * breadcrumbs improve docs for sort param * fix showArrows docs * remove .bc-link aria-label .. it's not needed if caption is resolved properly * use subfilter instead of enlist to evaluate the "excluded" variable. Be consistent with toc-macros * remove breadcrumbs macros - they have their own PR now * resolve conflict * add back doc-macros tiddler * integrate :then filter run prefix * remove .breadcrumbs macros and their config tiddlers * fix typos as requested --------- Co-authored-by: yaisog <m@rcuswinter.de>
30 lines
2.4 KiB
Plaintext
30 lines
2.4 KiB
Plaintext
created: 20211129022707404
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modified: 20230305125338118
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tags: [[Filter Filter Run Prefix]]
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title: Filter Filter Run Prefix (Examples)
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type: text/vnd.tiddlywiki
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<<.operator-example 1 "[tag[HelloThere]] :filter[get[text]length[]compare:integer:gteq[1000]]">>
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<<.operator-example 2 "[tag[HelloThere]] :filter[get[text]length[]compare:integer:lteq[2000]]">>
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<<.operator-example 3 "[tag[HelloThere]] :filter[get[text]length[]compare:integer:gteq[1000]] :filter[get[text]length[]compare:integer:lteq[2000]]">>
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<<.operator-example 4 "[tag[Features]] :filter[links[]!is[shadow]is[missing]]">>
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<<.operator-example 5 "A B C D E F :filter[<index>remainder[2]compare:integer:eq[0]]" "Return every other element of the input list">>
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<<.operator-example 6 "[tag[shopping]] :filter[{!!quantity}compare:integer:gt[4]] :map[addprefix[ ]addprefix{!!quantity}]">>
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<<.operator-example 7 "[tag[shopping]] :filter[{!!quantity}compare:integer:lteq[4]] :map[addprefix[ ]addprefix{!!quantity}]">>
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!! Comparison between `:filter` and `:and`/`+` filter run prefixes
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The functionality of the <<.op :filter>> filter run prefix has some overlap with the <<.op :and>> prefix (alias <<.op +>>). Notice the filter expressions above all have the following two properties:
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# The start of the filter expression transforms the input titles (i.e. `get[text]length[]`, `links[]`, `<index>remainder[2]`, `{!!quantity}`.
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# The end of the filter expression only sends input items to the output if they meet some condition (i.e. `compare`, `is`).
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The purpose of the <<.op :filter>> prefix is to return the original input titles despite property #1 causing those input titles to be transformed. That way, the "meet some condition" check can be performed on something other than the original input. If some filter expression does not require property #1, then the <<.op :and>> prefix can be used instead.
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| <<.op :filter>> | <<.op :and>> |
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|^<<.operator-example c1.1 "[tag[HelloThere]] :filter[get[text]length[]compare:integer:gteq[1000]]">>|^<<.operator-example c1.2 "[tag[HelloThere]] :and[get[text]length[]compare:integer:gteq[1000]]">>|
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|^<<.operator-example c2.1 "[tag[Features]] :filter[links[]!is[shadow]is[missing]]">>|^<<.operator-example c2.2 "[tag[Features]] :and[links[]!is[shadow]is[missing]]">>|
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|!results are the same|<|
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|^<<.operator-example c3.1 "cat can bat bug :filter[suffix[at]minlength[3]]">>|^<<.operator-example c3.2 "cat can bat bug :and[suffix[at]minlength[3]]">>| |