hugo/content/functions/union.md

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title	linktitle	description	godocref	date	publishdate	lastmod	categories	tags	ns	signature	workson	hugoversion	relatedfuncs	deprecated	aliases
union	union	Given two arrays or slices, returns a new array that contains the elements or objects that belong to either or both arrays/slices.		2017-02-01	2017-02-01	2017-03-12	functions	filtering lists		union SET1 SET2		0.20	intersect where	false

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 -->