Hugo collections.Union
Hugo Returns a slice containing the unique elements from two given slices.
Syntax
collections.Union SLICE1 SLICE2
Returns
[]any
Alias
union
{{ union (slice 1 2 3) (slice 3 4 5) }} → [1 2 3 4 5]
{{ union (slice 1 2 3) nil }} → [1 2 3]
{{ union nil (slice 1 2 3) }} → [1 2 3]
{{ union nil nil }} → []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 parameters.
See intersect for AND.