Merge commit 'e509cac533600cf4fa8382c9cdab78ddd82db688'

docs/content/en/functions/collections/Intersect.md

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+---
+title: collections.Intersect
+linkTitle: intersect
+description: Returns the common elements of two arrays or slices, in the same order as the first array.
+categories: [functions]
+keywords: []
+menu:
+  docs:
+    parent: functions
+function:
+  aliases: [intersect]
+  returnType: any
+  signatures: [collections.Intersect SET1 SET2]
+relatedFunctions:
+  - collections.Complement
+  - collections.Intersect
+  - collections.SymDiff
+  - collections.Union
+aliases: [/functions/intersect]
+---
+A useful example is to use it as `AND` filters when combined with where:
+
+## AND filter in where query
+
+```go-html-template
+{{ $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 parameters.
+
+See [union](/functions/collections/union) for `OR`.
+
+
+[partials]: /templates/partials/
+[single]: /templates/single-page-templates/