ref: 2e711a28c71e8667258e5ab824f9b9a71c261b0a
dir: /content/en/functions/complement.md/
---
title: "complement"
description: "`collections.Complement` (alias `complement`) gives the elements of a collection that are not in any of the others."
date: 2018-11-07
categories: [functions]
menu:
docs:
parent: "functions"
keywords: [collections,intersect,union]
signature: ["COLLECTION | complement COLLECTION [COLLECTION]..." ]
hugoversion: "0.51"
aliases: []
---
Example:
```go-html-template
{{ $pages := .Site.RegularPages | first 50 }}
{{ $news := where $pages "Type" "news" | first 5 }}
{{ $blog := where $pages "Type" "blog" | first 5 }}
{{ $other := $pages | complement $news $blog | first 10 }}
```
The above is an imaginary use case for the home page where you want to display different page listings in sections/boxes on different places on the page: 5 from `news`, 5 from the `blog` and then 10 of the pages not shown in the other listings, to _complement_ them.