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diff --git a/docs/content/en/functions/intersect.md b/docs/content/en/functions/intersect.md new file mode 100644 index 000000000..2fe73ded8 --- /dev/null +++ b/docs/content/en/functions/intersect.md @@ -0,0 +1,36 @@ +--- +title: intersect +linktitle: intersect +description: Returns the common elements of two arrays or slices, in the same order as the first array. +date: 2017-02-01 +publishdate: 2017-02-01 +lastmod: 2017-02-01 +categories: [functions] +menu: + docs: + parent: "functions" +keywords: [collections,intersect,union,complement,symdiff] +signature: ["intersect SET1 SET2"] +workson: [] +hugoversion: +relatedfuncs: [] +deprecated: false +aliases: [] +--- +An 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](/functions/union) for `OR`. + + +[partials]: /templates/partials/ +[single]: /templates/single-page-templates/ |