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hugo/content/en/functions/intersect.md
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Bjørn Erik Pedersen 00c4484c70 Squashed 'docs/' changes from 392668f4f..32cb8785e 
32cb8785e Fix page weights in content management section (#1896)
11977b96f Make relURL and related functions consistent (#1895)
f12180207 Clarify github deployment (#1894)
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660e7581c Replaced sudo in OpenBSD with doas (#1891)
e3fcdea10 fix a few minor grammatical issues on Firebase docs (#1889)
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6dc9e9860 Improve complement function (#1884)
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1b25ca34f Update the findRE and replaceRE functions (#1881)
28757ec73 Add Alora Labs website to showcase (#1494)
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35b904798 Add small documentation about .Site.Social.twitter variable (#1854)
672042f89 Consolidate site configuration
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e8d0e7bdf Include link to internal templates code (#1794)
7db6f0c01 Add example to split function (#1867)
be87dba80 Clarify split function docs (#1792)
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68f05fdc8 Fenced code blocks should have a language specified (#1861)
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e152cdf1f netlify: Hugo 0.105.0
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1e3b33804 use correct URL for Google Search console verification (#1851)
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83e8f2168 Clarify that a shortcode with .Inner must be closed (#1785)
4193f4445 Add Super Linter GitHub Action (#1845)
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63b3e082e Add tutorial on using fusejs to search examples (#1756)
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385fa77c6 Update articles.toml (#1840)
5e336bd26 Replace awkward wording (ESL?) (#1842)
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018f83bbe [comment platform] - add new alternative (#1751)
5636c208b Grammar and spelling fixes (#1836)
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301379fc3 fix: use shorter image URL to make it easier to read (#1835)
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09a7a46ae Remove my defunct and little used migrator (#1824)
347434cca netlify: Hugo 0.104.2
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c2baf7155 netlify: Hugo 0.104.1
05d1192cd Update diagrams.md (#1823)
3c43a8bbe netlify: Hugo 0.104.0
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8e3f9ca64 Remove outdated IE conditional comments example (#1821)
d1a84701b fix typo in template introduction (#1820)
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50f5d4776 Fix internal link (#1817)
6beb443c5 netlify: Hugo 0.103.0
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title, linktitle, description, date, publishdate, lastmod, categories, menu, keywords, signature, workson, hugoversion, relatedfuncs, deprecated, aliases
title linktitle description date publishdate lastmod categories menu keywords signature workson hugoversion relatedfuncs deprecated aliases
intersect intersect Returns the common elements of two arrays or slices, in the same order as the first array. 2017-02-01 2017-02-01 2017-02-01
functions
docs
parent
functions
collections
intersect
union
complement
symdiff
intersect SET1 SET2
false

A useful example is to use it as AND filters when combined with where:

AND filter in where query

{{ $pages := where .Site.RegularPages "Type" "not in" (slice "page" "about") }}
{{ $pages := $pages | union (where .Site.RegularPages "Params.pinned" true) }}
{{ $pages := $pages | intersect (where .Site.RegularPages "Params.images" "!=" nil) }}

The above fetches regular pages not of page or about type unless they are pinned. And finally, we exclude all pages with no images set in Page params.

See union for OR.

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