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diff --git a/docs/content/en/functions/union.md b/docs/content/en/functions/union.md deleted file mode 100644 index db3c14283..000000000 --- a/docs/content/en/functions/union.md +++ /dev/null @@ -1,50 +0,0 @@ ---- -title: union -# linktitle: union -description: Given two arrays or slices, returns a new array that contains the elements or objects that belong to either or both arrays/slices. -godocref: -date: 2017-02-01 -publishdate: 2017-02-01 -lastmod: 2017-03-12 -categories: [functions] -menu: - docs: - parent: "functions" -keywords: [filtering,lists] -signature: ["union SET1 SET2"] -workson: [] -hugoversion: 0.20 -relatedfuncs: [intersect,where] -deprecated: false -aliases: [] ---- - -Given two arrays (or slices) A and B, this function will return a new array that contains the elements or objects that belong to either A or to B or to both. The elements supported are strings, integers, and floats (only float64). - -``` -{{ union (slice 1 2 3) (slice 3 4 5) }} -<!-- returns [1 2 3 4 5] --> - -{{ union (slice 1 2 3) nil }} -<!-- returns [1 2 3] --> - -{{ union nil (slice 1 2 3) }} -<!-- returns [1 2 3] --> - -{{ union nil nil }} -<!-- returns an error because both arrays/slices have to be of the same type --> -``` - -## OR filter in where query - -This is also very useful to use as `OR` filters when combined with where: - -``` -{{ $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 [intersect](/functions/intersect) for `AND`. |